diff --git a/backend/internal/handler/inventory.go b/backend/internal/handler/inventory.go
index d3b1d1d..de0a72a 100644
--- a/backend/internal/handler/inventory.go
+++ b/backend/internal/handler/inventory.go
@@ -105,11 +105,23 @@ func (h *InventoryHandler) List(c *gin.Context) {
 	specStr := c.Query("spec")
 
 	if keyword != "" {
-		// 关键词匹配：商品名/拼音/首字母/编码 + 生产日期（对生产日期文本 LIKE，支持 "2010"/"2010-06"/"2010-06-04"）。
-		// 生产日期口径与 SELECT/排序一致：COALESCE(入库明细快照, 库存行快照)。
-		baseWhere += " AND (COALESCE(NULLIF(p.name,''), NULLIF(sii.product_name,''), inv.product_name) LIKE ? OR COALESCE(NULLIF(p.code,''), NULLIF(sii.product_code,''), inv.product_code) LIKE ? OR p.name_pinyin LIKE ? OR p.name_initials LIKE ? OR CAST(COALESCE(DATE(sii.production_date), DATE(inv.production_date)) AS CHAR) LIKE ?)"
+		// 关键词匹配：商品名/拼音/首字母/编码。
+		clause := "COALESCE(NULLIF(p.name,''), NULLIF(sii.product_name,''), inv.product_name) LIKE ? OR COALESCE(NULLIF(p.code,''), NULLIF(sii.product_code,''), inv.product_code) LIKE ? OR p.name_pinyin LIKE ? OR p.name_initials LIKE ?"
 		like := "%" + keyword + "%"
-		args = append(args, like, like, like, like, like)
+		args = append(args, like, like, like, like)
+		// 生产日期匹配：两侧都去掉分隔符按纯数字比对，输入带不带横杠都行
+		// （2002 / 200202 / 20020226 / 2002-02-26 均可命中 2002-02-26）。
+		// 口径与 SELECT/排序一致：COALESCE(入库明细快照, 库存行快照)。仅当关键词含数字才加此条，避免纯文字搜索命中全部日期。
+		if digits := strings.Map(func(r rune) rune {
+			if r >= '0' && r <= '9' {
+				return r
+			}
+			return -1
+		}, keyword); digits != "" {
+			clause += " OR REPLACE(CAST(COALESCE(DATE(sii.production_date), DATE(inv.production_date)) AS CHAR), '-', '') LIKE ?"
+			args = append(args, "%"+digits+"%")
+		}
+		baseWhere += " AND (" + clause + ")"
 	}
 	// 商品编码独立筛选（库存屏工具栏第二个搜索框，对齐原型 codeInput）
 	if code := c.Query("code"); code != "" {
diff --git a/backend/internal/handler/inventory_test.go b/backend/internal/handler/inventory_test.go
index c857ff8..066bf00 100644
--- a/backend/internal/handler/inventory_test.go
+++ b/backend/internal/handler/inventory_test.go
@@ -332,18 +332,21 @@ func TestInventoryHandler_List_SearchByProductionDate(t *testing.T) {
 	require.NoError(t, db.Create(&model.Inventory{ShopID: shop.ID, WarehouseID: &warehouse.ID, ProductID: &p1.ID, Quantity: 10, ProductionDate: d2010}).Error)
 	require.NoError(t, db.Create(&model.Inventory{ShopID: shop.ID, WarehouseID: &warehouse.ID, ProductID: &p2.ID, Quantity: 20, ProductionDate: d1999}).Error)
 
-	// 年份命中一条
-	w := makeRequest(r, "GET", "/api/v1/inventory?keyword=2010", token, nil)
-	assert.Equal(t, float64(1), parseResponse(w)["total"].(float64))
-	// 年-月命中一条
-	w = makeRequest(r, "GET", "/api/v1/inventory?keyword=2010-06", token, nil)
-	assert.Equal(t, float64(1), parseResponse(w)["total"].(float64))
-	// 完整日期命中一条
-	w = makeRequest(r, "GET", "/api/v1/inventory?keyword=1999-12-16", token, nil)
-	assert.Equal(t, float64(1), parseResponse(w)["total"].(float64))
-	// 不存在的日期零命中（同时验证不误伤名称/编码）
-	w = makeRequest(r, "GET", "/api/v1/inventory?keyword=2001", token, nil)
-	assert.Equal(t, float64(0), parseResponse(w)["total"].(float64))
+	expectTotal := func(kw string, want float64) {
+		w := makeRequest(r, "GET", "/api/v1/inventory?keyword="+kw, token, nil)
+		assert.Equalf(t, want, parseResponse(w)["total"].(float64), "keyword=%s", kw)
+	}
+	// 年份 / 年月 命中一条
+	expectTotal("2010", 1)
+	expectTotal("2010-06", 1)
+	expectTotal("201006", 1) // 无横杠年月
+	// 完整日期：带横杠 与 无横杠 都命中
+	expectTotal("2010-06-04", 1)
+	expectTotal("20100604", 1)
+	expectTotal("1999-12-16", 1)
+	expectTotal("19991216", 1)
+	// 不存在的日期零命中（同时验证纯数字不误伤，也不命中全部日期）
+	expectTotal("2001", 0)
 }
 
 // Summary 月初快照字段：月初数量 = 当前数量 − 本月净流水