diff --git a/blueprints/api.py b/blueprints/api.py
index 82ff818..4b642ad 100644
--- a/blueprints/api.py
+++ b/blueprints/api.py
@@ -1,5 +1,5 @@
 from flask import Blueprint, request, jsonify, session, current_app
-from urllib.parse import unquote, urlparse
+from urllib.parse import unquote, urljoin, urlparse
 from config import Config
 from extensions import db, redis_client, s3_client
 from models import User, SavedPrompt
@@ -72,6 +72,34 @@ def generate():
         user = db.session.get(User, user_id)
         data = request.json if request.is_json else request.form
 
+        image_urls = data.get(
+            "image",
+            data.get("image_urls", data.get("image_data", [])),
+        ) or []
+        if isinstance(image_urls, str):
+            image_urls = [image_urls]
+        elif not isinstance(image_urls, (list, tuple)):
+            return jsonify({"error": "参考图地址格式无效"}), 400
+
+        normalized_image_urls = []
+        for image_url in image_urls:
+            if not isinstance(image_url, str) or not image_url.strip():
+                return jsonify({"error": "参考图地址无效"}), 400
+
+            image_url = image_url.strip()
+            parsed_input = urlparse(image_url)
+            if image_url.startswith("/"):
+                absolute_url = urljoin(request.url_root, image_url)
+            elif parsed_input.scheme in ("http", "https") and parsed_input.netloc:
+                absolute_url = image_url
+            else:
+                return jsonify({"error": "参考图必须使用 HTTP(S) URL，不能使用 Base64"}), 400
+
+            parsed_url = urlparse(absolute_url)
+            if parsed_url.scheme not in ("http", "https") or not parsed_url.netloc:
+                return jsonify({"error": "参考图必须使用 HTTP(S) URL，不能使用 Base64"}), 400
+            normalized_image_urls.append(absolute_url)
+
         api_key, target_api, cost, use_trial, error = validate_generation_request(user, data)
         if error:
             return jsonify({"error": error}), 400
@@ -92,7 +120,6 @@ def generate():
             )
             return jsonify(result), status_code
 
-        image_data = data.get("image_data", [])
         if model_value == "gpt-image-2":
             payload = {
                 "prompt": prompt,
@@ -101,8 +128,8 @@ def generate():
                 "size": data.get("size") or "2048x2048",
                 "quality": "high",
             }
-            if image_data:
-                payload["image"] = [img.split(",", 1)[1] if "," in img else img for img in image_data]
+            if normalized_image_urls:
+                payload["image"] = normalized_image_urls
         else:
             payload = {
                 "prompt": prompt,
@@ -110,8 +137,8 @@ def generate():
                 "response_format": "url",
                 "aspect_ratio": data.get("ratio"),
             }
-            if image_data:
-                payload["image"] = [img.split(",", 1)[1] if "," in img else img for img in image_data]
+            if normalized_image_urls:
+                payload["image"] = normalized_image_urls
 
             if model_value in ("nano-banana-2", "gemini-3.1-flash-image-preview") and data.get("size"):
                 payload["image_size"] = data.get("size")
diff --git a/static/js/main.js b/static/js/main.js
index fb6849b..f5bb531 100644
--- a/static/js/main.js
+++ b/static/js/main.js
@@ -713,53 +713,27 @@ document.getElementById('submitBtn').onclick = async () => {
     currentGeneratedUrls = []; // 重置当前生成列表
 
     try {
-        let image_data = [];
+        let image = [];
 
-        // 1. 将图片转换为 Base64 (并压缩过大图片)
+        // 1. 上传参考图，生图接口统一使用 URL
         if (uploadedFiles.length > 0) {
-            btnText.innerText = "正在准备图片数据...";
-            const processImageFile = (file) => new Promise((resolve, reject) => {
-                const reader = new FileReader();
-                reader.onload = (e) => {
-                    const img = new Image();
-                    img.onload = () => {
-                        const maxDim = 2048;
-                        let w = img.width;
-                        let h = img.height;
+            btnText.innerText = "正在上传参考图...";
+            const formData = new FormData();
+            uploadedFiles.forEach(file => formData.append('images', file));
 
-                        if (w <= maxDim && h <= maxDim) {
-                            resolve(e.target.result);
-                            return;
-                        }
-
-                        if (w > h) {
-                            if (w > maxDim) {
-                                h = Math.round(h * (maxDim / w));
-                                w = maxDim;
-                            }
-                        } else {
-                            if (h > maxDim) {
-                                w = Math.round(w * (maxDim / h));
-                                h = maxDim;
-                            }
-                        }
-
-                        const canvas = document.createElement('canvas');
-                        canvas.width = w;
-                        canvas.height = h;
-                        const ctx = canvas.getContext('2d');
-                        ctx.drawImage(img, 0, 0, w, h);
-                        // 保持原格式，如果不是 png 则默认 jpeg (0.9 质量)
-                        const outType = file.type === 'image/png' ? 'image/png' : 'image/jpeg';
-                        resolve(canvas.toDataURL(outType, 0.9));
-                    };
-                    img.onerror = reject;
-                    img.src = e.target.result;
-                };
-                reader.onerror = reject;
-                reader.readAsDataURL(file);
+            const uploadResponse = await fetch('/api/upload', {
+                method: 'POST',
+                body: formData
             });
-            image_data = await Promise.all(uploadedFiles.map(f => processImageFile(f)));
+            const uploadResult = await uploadResponse.json();
+            if (!uploadResponse.ok || uploadResult.error) {
+                throw new Error(uploadResult.error || '参考图上传失败');
+            }
+
+            image = (uploadResult.urls || []).map(url => new URL(url, window.location.origin).href);
+            if (image.length !== uploadedFiles.length) {
+                throw new Error('部分参考图上传失败');
+            }
         }
 
         // 2. 并行启动多个生成任务
@@ -785,7 +759,7 @@ document.getElementById('submitBtn').onclick = async () => {
                         model: document.getElementById('modelSelect').value,
                         ratio: document.getElementById('modelSelect').value === GPT_IMAGE_EDIT_MODEL ? undefined : document.getElementById('ratioSelect').value,
                         size: document.getElementById('sizeSelect').value,
-                        image_data // 发送 Base64 数组
+                        image
                     })
                 });
                 const res = await r.json();