diff --git a/backend/internal/app/channel_model_pricing_test.go b/backend/internal/app/channel_model_pricing_test.go
index 68fed0790..aa5e61ee2 100644
--- a/backend/internal/app/channel_model_pricing_test.go
+++ b/backend/internal/app/channel_model_pricing_test.go
@@ -219,7 +219,17 @@ func TestRepriceTierFieldValidation(t *testing.T) {
 	}
 }
 
-func TestBatchRepricingRollsBackOnConcurrentChange(t *testing.T) {
+func TestNormalizeChannelModelTierSelectorAcceptsResolutionTypo(t *testing.T) {
+	selector, resolution, videoSeconds, err := normalizeChannelModelTierSelector("image", ChannelModelPriceTierRequest{
+		Selector: map[string]string{"resoluton": "2K"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if selector["resolution"] != "2k" || selector["resoluton"] != "" || resolution != "*" || videoSeconds != 0 {
+		t.Fatalf("selector=%v resolution=%q videoSeconds=%d", selector, resolution, videoSeconds)
+	}
+}
 	for _, target := range []string{"model", "tier"} {
 		t.Run(target, func(t *testing.T) {
 			svc, db, _ := seedRepricingModels(t)
diff --git a/backend/internal/app/channel_models_pricing.go b/backend/internal/app/channel_models_pricing.go
index 07a86ce8f..773ce4d68 100644
--- a/backend/internal/app/channel_models_pricing.go
+++ b/backend/internal/app/channel_models_pricing.go
@@ -144,6 +144,10 @@ func normalizeChannelModelTierSelector(capability string, input ChannelModelPric
 			}
 		case "vquality":
 			value = normalizeChannelModelTierResolution(value)
+		case "resolution", "resoluton":
+			// 兼容图片价格档的标准字段，以及历史接口误拼写 resoluton。
+			key = "resolution"
+			value = strings.ToLower(strings.TrimSpace(value))
 		case "videoSeconds":
 			seconds, err := strconv.Atoi(value)
 			if err != nil || seconds < 0 {
@@ -200,6 +204,9 @@ func normalizeChannelModelTierSelector(capability string, input ChannelModelPric
 	if _, exists := selector["vquality"]; exists && capability != "video" {
 		return nil, "", 0, BadAuthRequest("只有视频模型可以按分辨率配置价格档")
 	}
+	if _, exists := selector["resolution"]; exists && capability != "image" {
+		return nil, "", 0, BadAuthRequest("只有图片模型可以按分辨率配置价格档")
+	}
 	if _, exists := selector["videoSeconds"]; exists && capability != "video" {
 		return nil, "", 0, BadAuthRequest("只有视频模型可以按时长配置价格档")
 	}