diff --git a/backed/cmd/server/main.go b/backed/cmd/server/main.go
index cd622d5..0655c62 100644
--- a/backed/cmd/server/main.go
+++ b/backed/cmd/server/main.go
@@ -95,7 +95,6 @@ func main() {
 	task.Post("/form/:id", handler.SaveTaskForm)
 	task.Put("/form/:id", handler.SaveTaskForm)
 	task.Get("/form-data/:id", handler.GetTaskSavedForm)
-	task.Post("/qr/decode", handler.DecodeTaskQr)
 	task.Put("/update/:id", handler.UpdateTask)
 	task.Delete("/delete/:id", handler.DeleteTask)
 	task.Get("/execute/:id", handler.ExecuteTask)
diff --git a/backed/go.mod b/backed/go.mod
index 6ed0e4b..8f0794d 100644
--- a/backed/go.mod
+++ b/backed/go.mod
@@ -8,7 +8,6 @@ require (
 	github.com/go-resty/resty/v2 v2.16.5
 	github.com/gofiber/fiber/v2 v2.52.13
 	github.com/golang-jwt/jwt/v5 v5.3.1
-	github.com/makiuchi-d/gozxing v0.1.1
 	github.com/redis/go-redis/v9 v9.7.0
 	golang.org/x/crypto v0.50.0
 	golang.org/x/image v0.46.0
@@ -37,5 +36,4 @@ require (
 	golang.org/x/net v0.52.0 // indirect
 	golang.org/x/sys v0.48.0 // indirect
 	golang.org/x/text v0.42.0 // indirect
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 )
diff --git a/backed/go.sum b/backed/go.sum
index 603acbf..5ac93ea 100644
--- a/backed/go.sum
+++ b/backed/go.sum
@@ -33,8 +33,6 @@ github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
 github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
 github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
 github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
-github.com/makiuchi-d/gozxing v0.1.1 h1:xxqijhoedi+/lZlhINteGbywIrewVdVv2wl9r5O9S1I=
-github.com/makiuchi-d/gozxing v0.1.1/go.mod h1:eRIHbOjX7QWxLIDJoQuMLhuXg9LAuw6znsUtRkNw9DU=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
@@ -132,8 +130,6 @@ golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
 golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gorm.io/driver/mysql v1.6.0 h1:eNbLmNTpPpTOVZi8MMxCi2aaIm0ZpInbORNXDwyLGvg=
 gorm.io/driver/mysql v1.6.0/go.mod h1:D/oCC2GWK3M/dqoLxnOlaNKmXz8WNTfcS9y5ovaSqKo=
 gorm.io/driver/sqlite v1.6.0 h1:WHRRrIiulaPiPFmDcod6prc4l2VGVWHz80KspNsxSfQ=
diff --git a/backed/internal/handler/task.go b/backed/internal/handler/task.go
index 8a73273..3a2be58 100644
--- a/backed/internal/handler/task.go
+++ b/backed/internal/handler/task.go
@@ -415,36 +415,6 @@ func GetTaskSavedForm(c *fiber.Ctx) error {
 	return utils.Success(c, fiber.Map{"formData": task.FormData})
 }
 
-// DecodeTaskQrRequest 二维码解析请求
-type DecodeTaskQrRequest struct {
-	// Content 支持三种形式：base64 图片(dataURI)、http(s) 图片链接、纯 uuid/链接文本
-	Content string `json:"content"`
-}
-
-// DecodeTaskQr 解析签到二维码，返回其中的 uuid。
-// 前端上传二维码图片后调用本接口，把 uuid 存入表单（colName=uuid），
-// 避免把整张 base64 图片写进 formData（历史数据曾因此单条达 2.9MB）。
-func DecodeTaskQr(c *fiber.Ctx) error {
-	var req DecodeTaskQrRequest
-	if err := c.BodyParser(&req); err != nil {
-		return utils.FailParam(c, "请求参数错误")
-	}
-
-	content := strings.TrimSpace(req.Content)
-	if content == "" {
-		return utils.Fail(c, 400, "尚未上传二维码")
-	}
-
-	uuid, err := cpd.ResolveQrUuidFromContent(content)
-	if err != nil {
-		return utils.Fail(c, 400, "二维码解析失败: "+err.Error())
-	}
-	if uuid == "" {
-		return utils.Fail(c, 400, "二维码中未找到有效的二维码ID")
-	}
-
-	return utils.Success(c, fiber.Map{"uuid": uuid})
-}
 
 // DeleteTask 删除任务
 func DeleteTask(c *fiber.Ctx) error {
diff --git a/backed/internal/service/cpdaily/qrcode.go b/backed/internal/service/cpdaily/qrcode.go
index 28b7b9e..8e02760 100644
--- a/backed/internal/service/cpdaily/qrcode.go
+++ b/backed/internal/service/cpdaily/qrcode.go
@@ -1,22 +1,8 @@
 package cpdaily
 
 import (
-	"bytes"
-	"encoding/base64"
-	"fmt"
-	"image"
-	_ "image/gif"
-	_ "image/jpeg"
-	_ "image/png"
 	"regexp"
 	"strings"
-	"time"
-
-	"github.com/go-resty/resty/v2"
-	"github.com/makiuchi-d/gozxing"
-	"github.com/makiuchi-d/gozxing/qrcode"
-	"golang.org/x/image/draw"
-	_ "golang.org/x/image/webp"
 )
 
 // qrUuidPattern 匹配二维码内容中的 uuid 参数（如 ...?uuid=1583a6...&isNeedExtra=0）
@@ -33,6 +19,8 @@ var bareTokenPattern = regexp.MustCompile(`^[0-9a-zA-Z_-]{8,64}$`)
 
 // ExtractQrUuid 从二维码文本内容中提取签到二维码 uuid。
 // 支持三种形式：完整链接（取 uuid= 参数值）、32 位 hex 裸 uuid、其它形式的裸 uuid token。
+//
+// 二维码图片的识别在前端完成（jsQR），后端只接收解析后的 uuid 文本，故此处不涉及图片解码。
 func ExtractQrUuid(text string) string {
 	text = strings.TrimSpace(text)
 	if text == "" {
@@ -49,103 +37,3 @@ func ExtractQrUuid(text string) string {
 	}
 	return ""
 }
-
-// DecodeQRFromImage 解码图片数据中的二维码，返回其中文本内容。
-// 先直接解码，失败后放大图片重试（应对小尺寸/低分辨率截图）。
-func DecodeQRFromImage(data []byte) (string, error) {
-	img, _, err := image.Decode(bytes.NewReader(data))
-	if err != nil {
-		return "", fmt.Errorf("识别图片格式失败: %w", err)
-	}
-
-	text, err := decodeQRImage(img)
-	if err == nil {
-		return text, nil
-	}
-	// 放大 3 倍重试
-	if text, err2 := decodeQRImage(scaleImage(img, 3)); err2 == nil {
-		return text, nil
-	}
-	return "", fmt.Errorf("未能识别图片中的二维码: %w", err)
-}
-
-func decodeQRImage(img image.Image) (string, error) {
-	bmp, err := gozxing.NewBinaryBitmapFromImage(img)
-	if err != nil {
-		return "", err
-	}
-	hints := map[gozxing.DecodeHintType]interface{}{
-		gozxing.DecodeHintType_TRY_HARDER: true,
-	}
-	result, err := qrcode.NewQRCodeReader().Decode(bmp, hints)
-	if err != nil {
-		return "", err
-	}
-	return result.GetText(), nil
-}
-
-// scaleImage 将图片按整数倍放大（用于提高小图二维码的识别率）
-func scaleImage(img image.Image, factor int) image.Image {
-	b := img.Bounds()
-	dst := image.NewRGBA(image.Rect(0, 0, b.Dx()*factor, b.Dy()*factor))
-	draw.CatmullRom.Scale(dst, dst.Bounds(), img, b, draw.Over, nil)
-	return dst
-}
-
-// ResolveQrUuidFromContent 从用户提供的二维码内容中解析出签到 uuid。
-// 支持三种形式：
-//  1. 文本直填（二维码链接或纯 uuid）
-//  2. base64 图片（dataURI，前端上传的本地预览图）
-//  3. http(s) 图片链接（下载后解码）
-func ResolveQrUuidFromContent(content string) (string, error) {
-	content = strings.TrimSpace(content)
-	if content == "" {
-		return "", fmt.Errorf("尚未上传签到二维码")
-	}
-
-	// 1) 内容本身已是文本（链接或 uuid），直接提取
-	if uuid := ExtractQrUuid(content); uuid != "" {
-		return uuid, nil
-	}
-
-	// 2) base64 图片（dataURI）
-	if IsDataURIImage(content) {
-		idx := strings.Index(content, ",")
-		if idx < 0 {
-			return "", fmt.Errorf("二维码图片数据格式不正确")
-		}
-		imgBytes, err := base64.StdEncoding.DecodeString(content[idx+1:])
-		if err != nil {
-			return "", fmt.Errorf("解码二维码图片失败: %w", err)
-		}
-		return decodeQrTextToUuid(imgBytes)
-	}
-
-	// 3) http(s) 图片链接：下载后解码
-	if strings.HasPrefix(content, "http://") || strings.HasPrefix(content, "https://") {
-		client := resty.New().SetTimeout(30 * time.Second)
-		resp, err := client.R().
-			SetHeader("User-Agent", "Mozilla/5.0 (Linux; Android 15) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.81 Mobile Safari/537.36").
-			Get(content)
-		if err != nil {
-			return "", fmt.Errorf("下载二维码图片失败: %w", err)
-		}
-		if resp.StatusCode() > 299 {
-			return "", fmt.Errorf("下载二维码图片失败(HTTP %d)", resp.StatusCode())
-		}
-		return decodeQrTextToUuid(resp.Body())
-	}
-
-	return "", fmt.Errorf("无法识别的二维码内容，请上传二维码图片或粘贴二维码链接")
-}
-
-func decodeQrTextToUuid(imgBytes []byte) (string, error) {
-	text, err := DecodeQRFromImage(imgBytes)
-	if err != nil {
-		return "", err
-	}
-	if uuid := ExtractQrUuid(text); uuid != "" {
-		return uuid, nil
-	}
-	return "", fmt.Errorf("二维码内容中未找到 uuid: %s", text)
-}
diff --git a/backed/internal/service/cpdaily/qrcode_test.go b/backed/internal/service/cpdaily/qrcode_test.go
index df88a2b..bfbf9ea 100644
--- a/backed/internal/service/cpdaily/qrcode_test.go
+++ b/backed/internal/service/cpdaily/qrcode_test.go
@@ -1,8 +1,6 @@
 package cpdaily
 
 import (
-	"encoding/base64"
-	"os"
 	"testing"
 )
 
@@ -16,12 +14,12 @@ func TestExtractQrUuid(t *testing.T) {
 		{"no uuid here", ""},
 		{"", ""},
 		// 裸 uuid 回读（formData 只存 uuid 后的解析路径）
-		{"abc123XYZ", "abc123XYZ"},                                // 非 32-hex 的裸 uuid
+		{"abc123XYZ", "abc123XYZ"}, // 非 32-hex 的裸 uuid
 		{"1583a66272854585833eb13b56fc1937", "1583a66272854585833eb13b56fc1937"}, // 32-hex
-		{"uuid_with-dash", "uuid_with-dash"},                      // 含 _ 和 -
-		{"ab", ""},                                                // 太短，不认为是 uuid
-		{"has space x", ""},                                       // 含空白，不认为是 uuid
-		{"https://x.edu.cn/a/b", ""},                              // URL 含符号，不走裸 token 分支
+		{"uuid_with-dash", "uuid_with-dash"},                                     // 含 _ 和 -
+		{"ab", ""},                                                               // 太短，不认为是 uuid
+		{"has space x", ""},                                                      // 含空白，不认为是 uuid
+		{"https://x.edu.cn/a/b", ""},                                             // URL 含符号，不走裸 token 分支
 	}
 	for _, c := range cases {
 		if got := ExtractQrUuid(c.in); got != c.want {
@@ -29,39 +27,3 @@ func TestExtractQrUuid(t *testing.T) {
 		}
 	}
 }
-
-func TestResolveQrUuidFromLinkText(t *testing.T) {
-	uuid, err := ResolveQrUuidFromContent("https://ynu.campusphere.net/wec-counselor-sign-apps/stu/qrsign/index.html?uuid=1583a66272854585833eb13b56fc1937&isNeedExtra=0")
-	if err != nil || uuid != testQrUuid {
-		t.Fatalf("link text resolve = (%q, %v), want (%q, nil)", uuid, err, testQrUuid)
-	}
-	if _, err := ResolveQrUuidFromContent(""); err == nil {
-		t.Fatal("empty content should return error")
-	}
-	if _, err := ResolveQrUuidFromContent("some random text"); err == nil {
-		t.Fatal("unrecognized content should return error")
-	}
-}
-
-func TestDecodeQrImageAndResolve(t *testing.T) {
-	imgBytes, err := os.ReadFile("testdata/test_qr.png")
-	if err != nil {
-		t.Fatalf("read test qr image: %v", err)
-	}
-
-	// 1) 直接解码图片中的二维码
-	text, err := DecodeQRFromImage(imgBytes)
-	if err != nil {
-		t.Fatalf("decode qr image: %v", err)
-	}
-	if got := ExtractQrUuid(text); got != testQrUuid {
-		t.Fatalf("decoded text %q -> uuid %q, want %q", text, got, testQrUuid)
-	}
-
-	// 2) dataURI 形式（前端本地上传的图片）
-	dataURI := "data:image/png;base64," + base64.StdEncoding.EncodeToString(imgBytes)
-	uuid, err := ResolveQrUuidFromContent(dataURI)
-	if err != nil || uuid != testQrUuid {
-		t.Fatalf("dataURI resolve = (%q, %v), want (%q, nil)", uuid, err, testQrUuid)
-	}
-}
diff --git a/backed/internal/service/cpdaily/task.go b/backed/internal/service/cpdaily/task.go
index 5ff95e9..945a937 100644
--- a/backed/internal/service/cpdaily/task.go
+++ b/backed/internal/service/cpdaily/task.go
@@ -974,9 +974,10 @@ func fillExtraFields(rows map[string]interface{}, formItems []cpdmodel.CpTaskFor
 }
 
 // fillScanSubmitForm 生成扫码签到（signMode=2）的提交表单：
-// 取二维码ID（uuid）字段，解析出 uuid 后用 qrUuid 替代 signInstanceWid（两者不并存），
+// 取二维码ID（uuid）字段，提取 uuid 后用 qrUuid 替代 signInstanceWid（两者不并存），
 // 不携带经纬度等定位字段。
 // 字段名兼容：新数据为 uuid，历史数据为 qrCode。
+// 二维码图片的识别在前端完成，这里只处理已解析出的 uuid 文本。
 func fillScanSubmitForm(rows map[string]interface{}, formItems []cpdmodel.CpTaskFormItem) (map[string]interface{}, error) {
 	qrContent := ""
 	for _, v := range formItems {
@@ -985,9 +986,9 @@ func fillScanSubmitForm(rows map[string]interface{}, formItems []cpdmodel.CpTask
 			break
 		}
 	}
-	uuid, err := ResolveQrUuidFromContent(qrContent)
-	if err != nil {
-		return nil, fmt.Errorf("二维码签到任务缺少有效签到二维码: %w", err)
+	uuid := ExtractQrUuid(qrContent)
+	if uuid == "" {
+		return nil, fmt.Errorf("二维码签到任务缺少有效的二维码ID（uuid），请重新上传二维码解析")
 	}
 
 	result := map[string]interface{}{
diff --git a/backed/internal/service/cpdaily/testdata/test_qr.png b/backed/internal/service/cpdaily/testdata/test_qr.png
deleted file mode 100644
index d720598..0000000
Binary files a/backed/internal/service/cpdaily/testdata/test_qr.png and /dev/null differ
diff --git a/frondend/src/api/auth.ts b/frondend/src/api/auth.ts
index 5457a40..e630c12 100644
--- a/frondend/src/api/auth.ts
+++ b/frondend/src/api/auth.ts
@@ -254,11 +254,6 @@ export function getTaskSavedForm(id: number) {
   return api.get<{ data: { formData: string } }>(`/task/form-data/${id}`)
 }
 
-/** 解析签到二维码（图片 dataURI / http 链接 / 纯 uuid），返回其中的 uuid */
-export function decodeQr(content: string) {
-  return api.post<{ data: { uuid: string } }>('/task/qr/decode', { content })
-}
-
 /** 保存任务表单 */
 export function saveTaskForm(id: number, formData: FormItem[]) {
   return api.post(`/task/form/${id}`, { formData })
diff --git a/frondend/src/views/home/HomeView.vue b/frondend/src/views/home/HomeView.vue
index 0b4dedc..0847553 100644
--- a/frondend/src/views/home/HomeView.vue
+++ b/frondend/src/views/home/HomeView.vue
@@ -472,24 +472,7 @@ async function handleImageUpload(index: number, isEdit: boolean) {
       uploadingLabel.value = '解析二维码中...'
       try {
         const text = await decodeQrInBrowser(picked)
-        let uuid = text ? extractQrUuid(text) : ''
-        // 前端识别失败时，降级走后端已有识别能力（复用 gozxing，多尺度重试）
-        if (!uuid) {
-          const dataUrl = await new Promise<string>((resolve) => {
-            const r = new FileReader()
-            r.onload = (e) => resolve((e.target?.result as string) || '')
-            r.onerror = () => resolve('')
-            r.readAsDataURL(picked)
-          })
-          if (dataUrl) {
-            try {
-              const res = await authApi.decodeQr(dataUrl)
-              uuid = res.data.data.uuid || ''
-            } catch {
-              // 忽略，走统一失败提示
-            }
-          }
-        }
+        const uuid = text ? extractQrUuid(text) : ''
         if (!uuid) {
           message.error('未识别到二维码，请换一张更清晰的二维码图片')
           return