diff --git a/src/pages/category/index.vue b/src/pages/category/index.vue
index bae3729..ef1ff57 100644
--- a/src/pages/category/index.vue
+++ b/src/pages/category/index.vue
@@ -65,10 +65,15 @@
             <select class="input attr-type" v-model="attr.attrType">
               <option value="number">数字</option>
               <option value="text">文本</option>
+              <option value="formula">公式</option>
             </select>
             <input class="input attr-unit" v-model="attr.unit" placeholder="单位" />
             <text class="attr-delete" @click="removeAttr(index)">×</text>
           </view>
+          <view v-for="(attr, index) in attributes" :key="'formula-'+index" class="formula-item" v-if="attr.attrType === 'formula'">
+            <text class="formula-label">公式：</text>
+            <input class="input formula-input" v-model="attr.formula" placeholder="例如: length * width" />
+          </view>
           <view class="add-attr-btn" @click="addAttr">
             <text>+ 添加属性</text>
           </view>
@@ -192,17 +197,18 @@ export default {
           name: a.name,
           attrType: a.attrType || 'number',
           unit: a.unit || '',
+          formula: a.formula || '',
           attrId: a.attrId
         }))
         if (this.attributes.length === 0) {
-          this.attributes.push({ name: '', attrType: 'number', unit: '', attrId: '' })
+          this.attributes.push({ name: '', attrType: 'number', unit: '', formula: '', attrId: '' })
         }
       } catch (e) {
-        this.attributes = [{ name: '', attrType: 'number', unit: '', attrId: '' }]
+        this.attributes = [{ name: '', attrType: 'number', unit: '', formula: '', attrId: '' }]
       }
     },
     addAttr() {
-      this.attributes.push({ name: '', attrType: 'number', unit: '', attrId: '' })
+      this.attributes.push({ name: '', attrType: 'number', unit: '', formula: '', attrId: '' })
     },
     removeAttr(index) {
       this.attributes.splice(index, 1)
@@ -464,5 +470,29 @@ export default {
   border: 2rpx dashed #667eea;
   border-radius: 12rpx;
   margin-top: 20rpx;
+
+.formula-item {
+  display: flex;
+  align-items: center;
+  margin-bottom: 20rpx;
+  padding: 10rpx 0;
+  background: #fffbe6;
+  border-radius: 12rpx;
 }
-</style>
\ No newline at end of file
+
+.formula-label {
+  font-size: 26rpx;
+  color: #fa8c16;
+  padding: 0 20rpx;
+}
+
+.formula-input {
+  flex: 1;
+  height: 70rpx;
+  background: transparent;
+  border-radius: 12rpx;
+  padding: 0 20rpx;
+  font-size: 26rpx;
+  color: #fa8c16;
+}
+</style>