diff --git a/src/main/java/com/extendedae_plus/mixin/GuiPatternEncodingTermMixin.java b/src/main/java/com/extendedae_plus/mixin/GuiPatternEncodingTermMixin.java
index 76e5114..a0e7b46 100644
--- a/src/main/java/com/extendedae_plus/mixin/GuiPatternEncodingTermMixin.java
+++ b/src/main/java/com/extendedae_plus/mixin/GuiPatternEncodingTermMixin.java
@@ -1,17 +1,16 @@
 package com.extendedae_plus.mixin;
 
-import com.extendedae_plus.mixin.accessor.AEBaseScreenAccessor;
 import appeng.client.gui.me.items.PatternEncodingTermScreen;
 import appeng.client.gui.widgets.IconButton;
 import appeng.client.gui.Icon;
 import appeng.client.gui.style.ScreenStyle;
 import appeng.menu.me.items.PatternEncodingTermMenu;
+import appeng.parts.encoding.EncodingMode;
+import appeng.menu.SlotSemantics;
 import net.minecraft.client.gui.components.Tooltip;
-import net.minecraft.client.gui.components.Button;
-import net.minecraft.client.gui.components.events.GuiEventListener;
-import net.minecraft.client.gui.narration.NarratableEntry;
 import net.minecraft.network.chat.Component;
 import net.minecraft.world.entity.player.Inventory;
+import net.minecraft.world.inventory.Slot;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
@@ -20,6 +19,8 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 import com.glodblock.github.extendedae.network.EPPNetworkHandler;
 import com.glodblock.github.glodium.network.packet.CGenericPacket;
+import com.extendedae_plus.mixin.accessor.ScreenAccessor;
+import com.extendedae_plus.mixin.accessor.AEBaseScreenAccessor;
 
 /**
  * 在 AE2 的 PatternEncodingTermScreen 界面中，给编码按钮旁添加一个“上传到矩阵”按钮。
@@ -30,10 +31,12 @@ public abstract class GuiPatternEncodingTermMixin<C extends PatternEncodingTermM
 
     @Unique
     private IconButton epp$uploadButton;
+    @Unique
+    private boolean epp$addedWidget = false;
+    @Unique
+    private boolean epp$usingToolbar = false;
 
-    // 通过 Accessor 调用 AEBaseScreen#addToLeftToolbar
-
-    // 在构造函数尾部创建按钮实例（仅创建，不添加）
+    // 在构造函数尾部创建按钮实例并加入普通部件列表
     @Inject(method = "<init>", at = @At("TAIL"), remap = false)
     private void epp$onInit(C menu, Inventory playerInventory, Component title, ScreenStyle style, CallbackInfo ci) {
         // 选择一个合适的图标占位（AE2 暂无显式“上传”图标，这里先用 PATTERN_ACCESS_SHOW）
@@ -62,9 +65,81 @@ public abstract class GuiPatternEncodingTermMixin<C extends PatternEncodingTermM
         };
         this.epp$uploadButton.setTooltip(Tooltip.create(Component.translatable("extendedae_plus.upload_to_matrix")));
         System.out.println("[EAE+][Client] Created upload button in PatternEncodingTermScreen ctor tail");
-        // 直接在构造尾部加入左侧工具栏，避免目标类未覆写 init 导致的注入不到
-        ((AEBaseScreenAccessor) (Object) this).epp$addToLeftToolbar(this.epp$uploadButton);
-        System.out.println("[EAE+][Client] Added upload button to left toolbar in ctor tail");
+        // 注意：此处不立即添加到 Screen，等到 updateBeforeRender 首帧再添加，避免在构造期调用导致异常
+        this.epp$uploadButton.visible = false; // 初始隐藏，等待定位
+    }
+
+    // 在每帧渲染前定位按钮到“已编码样板槽位”的左侧
+    @Inject(method = "updateBeforeRender", at = @At("TAIL"), remap = false)
+    private void epp$positionUploadButton(CallbackInfo ci) {
+        try {
+            if (this.epp$uploadButton == null) {
+                return;
+            }
+
+            // 首帧尝试将按钮加入到 Screen 的可渲染部件中
+            if (!this.epp$addedWidget) {
+                try {
+                    ((ScreenAccessor)(Object)this).epp$invokeAddRenderableWidget(this.epp$uploadButton);
+                    this.epp$addedWidget = true;
+                    this.epp$usingToolbar = false;
+                    System.out.println("[EAE+][Client] Added upload button as normal widget in first updateBeforeRender");
+                } catch (Throwable t) {
+                    System.out.println("[EAE+][Client] addRenderableWidget failed, fallback to left toolbar: " + t);
+                    try {
+                        ((AEBaseScreenAccessor)(Object)this).epp$addToLeftToolbar(this.epp$uploadButton);
+                        this.epp$addedWidget = true;
+                        this.epp$usingToolbar = true;
+                        this.epp$uploadButton.visible = true;
+                        System.out.println("[EAE+][Client] Fallback added to left toolbar");
+                    } catch (Throwable t2) {
+                        System.out.println("[EAE+][Client] Fallback addToLeftToolbar also failed: " + t2);
+                        // 放弃添加，避免死循环
+                        this.epp$addedWidget = true;
+                    }
+                }
+            }
+
+            // 仅在“合成模式”下显示按钮（与上传逻辑一致）
+            var self = (PatternEncodingTermScreen<?>) (Object) this;
+            var menu = (PatternEncodingTermMenu) self.getMenu();
+            if (menu == null) {
+                return;
+            }
+            boolean craftingMode = menu.getMode() == EncodingMode.CRAFTING;
+
+            Slot encoded = null;
+            for (Slot s : menu.slots) {
+                var sem = menu.getSlotSemantic(s);
+                if (sem == SlotSemantics.ENCODED_PATTERN) {
+                    encoded = s;
+                    break;
+                }
+            }
+
+            // 如果退回到左侧工具栏显示，则不做定位
+            if (this.epp$usingToolbar) {
+                return;
+            }
+
+            if (craftingMode && encoded != null) {
+                int slotX = self.getGuiLeft() + encoded.x;
+                int slotY = self.getGuiTop() + encoded.y;
+                int bw = this.epp$uploadButton.getWidth();
+                int bh = this.epp$uploadButton.getHeight();
+                int gap = 3;
+
+                this.epp$uploadButton.setX(slotX - gap - bw);
+                this.epp$uploadButton.setY(slotY + (18 - bh) / 2);
+                this.epp$uploadButton.visible = true;
+                // 可选：当槽位有编码图样时启用
+                this.epp$uploadButton.active = !encoded.getItem().isEmpty();
+            } else {
+                this.epp$uploadButton.visible = false;
+            }
+        } catch (Throwable t) {
+            System.out.println("[EAE+][Client] updateBeforeRender positioning failed: " + t);
+        }
     }
 
 }
diff --git a/src/main/java/com/extendedae_plus/mixin/accessor/ScreenAccessor.java b/src/main/java/com/extendedae_plus/mixin/accessor/ScreenAccessor.java
new file mode 100644
index 0000000..c7d286b
--- /dev/null
+++ b/src/main/java/com/extendedae_plus/mixin/accessor/ScreenAccessor.java
@@ -0,0 +1,14 @@
+package com.extendedae_plus.mixin.accessor;
+
+import net.minecraft.client.gui.components.events.GuiEventListener;
+import net.minecraft.client.gui.narration.NarratableEntry;
+import net.minecraft.client.gui.screens.Screen;
+import net.minecraft.client.gui.components.Renderable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(Screen.class)
+public interface ScreenAccessor {
+    @Invoker("addRenderableWidget")
+    <T extends GuiEventListener & Renderable & NarratableEntry> T epp$invokeAddRenderableWidget(T widget);
+}
diff --git a/src/main/resources/extendedae_plus.mixins.json b/src/main/resources/extendedae_plus.mixins.json
index 1073507..4d2a794 100644
--- a/src/main/resources/extendedae_plus.mixins.json
+++ b/src/main/resources/extendedae_plus.mixins.json
@@ -9,7 +9,8 @@
     "GuiExPatternTerminalMixin",
     "HighlightButtonMixin",
     "GuiPatternEncodingTermMixin",
-    "accessor.AEBaseScreenAccessor"
+    "accessor.AEBaseScreenAccessor",
+    "accessor.ScreenAccessor"
   ],
   "mixins": [
     "ContainerExPatternProviderMixin",