diff --git a/src/utils/zplGenerator.js b/src/utils/zplGenerator.js
index 6b99058..0e8ee9c 100644
--- a/src/utils/zplGenerator.js
+++ b/src/utils/zplGenerator.js
@@ -201,7 +201,7 @@ export class ZPLGenerator {
       case 'day':
         return String(date.getDate())
       case 'week':
-        return this.calculateWeekNumber(date, element.firstWeekDate)
+        return this.calculateWeekNumber(date, element.firstDayOfWeek)
       case 'weekday':
         return this.calculateWeekday(date, element.firstDayOfWeek)
       case 'full':
@@ -210,22 +210,34 @@ export class ZPLGenerator {
     }
   }
 
-  calculateWeekNumber(date, firstWeekDateStr) {
-    let firstWeekDate = new Date(date.getFullYear(), 0, 1)
-    if (firstWeekDateStr) {
-      const parsed = this.parseDateString(firstWeekDateStr)
-      if (parsed) {
-        firstWeekDate = parsed
-      }
-    }
-    const diffMs = date.getTime() - firstWeekDate.getTime()
+  calculateWeekNumber(date, firstDayOfWeekStr) {
+    const yearStartDate = new Date(date.getFullYear(), 0, 1)
+    const firstDayOfWeek = Number(firstDayOfWeekStr === undefined || firstDayOfWeekStr === null || firstDayOfWeekStr === '' ? 0 : firstDayOfWeekStr)
+    const normalizedFirstDayOfWeek = Number.isNaN(firstDayOfWeek) ? 0 : Math.max(0, Math.min(6, firstDayOfWeek))
+
+    const diffMs = date.getTime() - yearStartDate.getTime()
     const diffDays = Math.floor(diffMs / 86400000)
-    const weekNo = Math.floor(diffDays / 7) + 1
-    return String(Math.max(1, weekNo))
+    if (diffDays <= 0) {
+      return `01${String(date.getFullYear() % 100).padStart(2, '0')}`
+    }
+
+    const yearStartWeekday = yearStartDate.getDay() // 0=周日,1=周一...6=周六
+    const daysToNextWeekStart = (normalizedFirstDayOfWeek - yearStartWeekday + 7) % 7
+    if (daysToNextWeekStart === 0) {
+      const weekNo = Math.floor(diffDays / 7) + 1
+      const normalizedWeekNo = Math.max(1, weekNo)
+      return `${String(normalizedWeekNo).padStart(2, '0')}${String(date.getFullYear() % 100).padStart(2, '0')}`
+    }
+    if (diffDays < daysToNextWeekStart) {
+      return `01${String(date.getFullYear() % 100).padStart(2, '0')}`
+    }
+    const weekNo = Math.floor((diffDays - daysToNextWeekStart) / 7) + 2
+    const normalizedWeekNo = Math.max(1, weekNo)
+    return `${String(normalizedWeekNo).padStart(2, '0')}${String(date.getFullYear() % 100).padStart(2, '0')}`
   }
 
   calculateWeekday(date, firstDayOfWeekStr) {
-    const firstDayOfWeek = Number(firstDayOfWeekStr || 1)
+    const firstDayOfWeek = Number(firstDayOfWeekStr === undefined || firstDayOfWeekStr === null || firstDayOfWeekStr === '' ? 0 : firstDayOfWeekStr)
     const dayOfWeek = date.getDay() === 0 ? 7 : date.getDay()
     const adjustedDay = ((dayOfWeek - firstDayOfWeek + 7) % 7) + 1
     return String(adjustedDay)
diff --git a/src/views/modules/labelSetting/components/PropertyForm.vue b/src/views/modules/labelSetting/components/PropertyForm.vue
index d040518..33d8c53 100644
--- a/src/views/modules/labelSetting/components/PropertyForm.vue
+++ b/src/views/modules/labelSetting/components/PropertyForm.vue
@@ -185,16 +185,11 @@
           </div>
 
           <template v-if="element.dateExtractType === 'week'">
-            <el-form-item label="第一周日期">
-              <el-date-picker
-                v-model="element.firstWeekDate"
-                type="date"
-                placeholder="选择第一周日期"
-                size="mini"
-                style="width: 100%;"
-                format="yyyy-MM-dd"
-                value-format="yyyy-MM-dd">
-              </el-date-picker>
+            <el-form-item label="每周第一天">
+              <el-select v-model="element.firstDayOfWeek" size="mini" style="width: 100%;">
+                <el-option label="周日" value="0" />
+                <el-option label="周一" value="1" />
+              </el-select>
             </el-form-item>
           </template>
 
@@ -719,7 +714,7 @@ export default {
         this.setElementDefault('yearDigits', '4')
         this.setElementDefault('monthDayDigits', '2')
         this.setElementDefault('firstWeekDate', '')
-        this.setElementDefault('firstDayOfWeek', '1')
+        this.setElementDefault('firstDayOfWeek', '0')
         this.setElementDefault('dateOffsetDays', 0)
       } else if (this.element.dataType === 'number') {
         this.setElementDefault('roundHalfUp', true)
@@ -771,7 +766,7 @@ export default {
         this.$set(this.element, 'yearDigits', '4')
         this.$set(this.element, 'monthDayDigits', '2')
         this.$set(this.element, 'firstWeekDate', '')
-        this.$set(this.element, 'firstDayOfWeek', '1')
+        this.$set(this.element, 'firstDayOfWeek', '0')
         this.$set(this.element, 'dateOffsetDays', 0)
       } else if (newType === 'number') {
         this.$set(this.element, 'roundHalfUp', true)