diff --git a/common-files/src/main/resources/translations/en.yml b/common-files/src/main/resources/translations/en.yml
index 013865146..2377b162b 100644
--- a/common-files/src/main/resources/translations/en.yml
+++ b/common-files/src/main/resources/translations/en.yml
@@ -162,6 +162,7 @@ warning.config.recipe.smithing_transform.post_processor.missing_type: "<yellow>I
 warning.config.recipe.smithing_transform.post_processor.invalid_type: "<yellow>Issue found in file <arg:0> - The smithing transform recipe '<arg:1>' is using an invalid post processor type '<arg:2>'.</yellow>"
 warning.config.recipe.smithing_transform.post_processor.keep_component.missing_components: "<yellow>Issue found in file <arg:0> - The smithing transform recipe '<arg:1>' is missing the required argument 'components' for post-processors 'keep_components'.</yellow>"
 warning.config.recipe.smithing_transform.post_processor.keep_component.missing_tags: "<yellow>Issue found in file <arg:0> - The smithing transform recipe '<arg:1>' is missing the required argument 'tags' for post-processors 'keep_tags'.</yellow>"
+warning.config.recipe.smithing_transform.post_processor.keep_custom_data.missing_paths: "<yellow>Issue found in file <arg:0> - The smithing transform recipe '<arg:1>' is missing the required argument 'paths' for post-processors 'keep_custom_data'.</yellow>"
 warning.config.recipe.smithing_transform.missing_base: "<yellow>Issue found in file <arg:0> - The smithing transform recipe '<arg:1>' is missing the required 'base' argument.</yellow>"
 warning.config.recipe.smithing_trim.missing_base: "<yellow>Issue found in file <arg:0> - The smithing trim recipe '<arg:1>' is missing the required 'base' argument.</yellow>"
 warning.config.recipe.smithing_trim.missing_template_type: "<yellow>Issue found in file <arg:0> - The smithing trim recipe '<arg:1>' is missing the required 'template-type' argument.</yellow>"
diff --git a/common-files/src/main/resources/translations/zh_cn.yml b/common-files/src/main/resources/translations/zh_cn.yml
index 1bcf6cb8f..06d51777c 100644
--- a/common-files/src/main/resources/translations/zh_cn.yml
+++ b/common-files/src/main/resources/translations/zh_cn.yml
@@ -159,6 +159,7 @@ warning.config.recipe.smithing_transform.post_processor.missing_type: "<yellow>
 warning.config.recipe.smithing_transform.post_processor.invalid_type: "<yellow>在文件 <arg:0> 发现问题 - 锻造升级配方 '<arg:1>' 使用了无效的后处理器类型 '<arg:2>'</yellow>"
 warning.config.recipe.smithing_transform.post_processor.keep_component.missing_components: "<yellow>在文件 <arg:0> 发现问题 - 锻造升级配方 '<arg:1>' 的 'keep_components' 后处理器缺少必需的 'components' 参数</yellow>"
 warning.config.recipe.smithing_transform.post_processor.keep_component.missing_tags: "<yellow>在文件 <arg:0> 发现问题 - 锻造升级配方 '<arg:1>' 的 'keep_tags' 后处理器缺少必需的 'tags' 参数</yellow>"
+warning.config.recipe.smithing_transform.post_processor.keep_custom_data.missing_paths: "<yellow>在文件 <arg:0> 发现问题 - 锻造升级配方 '<arg:1>' 的 'keep_custom_data' 后处理器缺少必需的 'paths' 参数</yellow>"
 warning.config.recipe.smithing_transform.missing_base: "<yellow>在文件 <arg:0> 发现问题 - 锻造升级配方 '<arg:1>' 缺少必需的 'base' 参数</yellow>"
 warning.config.recipe.smithing_trim.missing_base: "<yellow>在文件 <arg:0> 发现问题 - 锻造纹饰配方 '<arg:1>' 缺少必需的 'base' 参数</yellow>"
 warning.config.recipe.smithing_trim.missing_template_type: "<yellow>在文件 <arg:0> 发现问题 - 锻造纹饰配方 '<arg:1>' 缺少必需的 'template-type' 参数</yellow>"
diff --git a/core/src/main/java/net/momirealms/craftengine/core/item/recipe/CustomSmithingTransformRecipe.java b/core/src/main/java/net/momirealms/craftengine/core/item/recipe/CustomSmithingTransformRecipe.java
index 190ee8004..87730aa0e 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/item/recipe/CustomSmithingTransformRecipe.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/item/recipe/CustomSmithingTransformRecipe.java
@@ -19,10 +19,7 @@ import net.momirealms.craftengine.core.util.*;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
+import java.util.*;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -232,10 +229,12 @@ public class CustomSmithingTransformRecipe<T> extends AbstractedFixedResultRecip
         public static final Key KEEP_COMPONENTS = Key.of("craftengine:keep_components");
         public static final Key KEEP_TAGS = Key.of("craftengine:keep_tags");
         public static final Key MERGE_ENCHANTMENTS = Key.of("craftengine:merge_enchantments");
+        public static final Key KEEP_CUSTOM_DATA = Key.of("craftengine:keep_custom_data");
 
         static {
             if (VersionHelper.isOrAbove1_20_5()) {
                 register(KEEP_COMPONENTS, KeepComponents.FACTORY);
+                register(KEEP_CUSTOM_DATA, KeepCustomData.FACTORY);
             } else {
                 register(KEEP_TAGS, KeepTags.FACTORY);
             }
@@ -315,6 +314,42 @@ public class CustomSmithingTransformRecipe<T> extends AbstractedFixedResultRecip
         }
     }
 
+    public static class KeepCustomData implements ItemDataProcessor {
+        public static final Factory FACTORY = new Factory();
+        private final List<String[]> paths;
+
+        public KeepCustomData(List<String[]> data) {
+            this.paths = data;
+        }
+
+        @Override
+        public void accept(Item<?> item1, Item<?> item2, Item<?> item3) {
+            for (String[] path : this.paths) {
+                Object dataObj = item1.getJavaTag((Object[]) path);
+                if (dataObj != null) {
+                    item3.setTag(dataObj, (Object[]) path);
+                }
+            }
+        }
+
+        @Override
+        public Key type() {
+            return ItemDataProcessors.KEEP_CUSTOM_DATA;
+        }
+
+        public static class Factory implements ProcessorFactory {
+
+            @Override
+            public ItemDataProcessor create(Map<String, Object> arguments) {
+                List<String> paths = MiscUtils.getAsStringList(ResourceConfigUtils.requireNonNullOrThrow(
+                        arguments.get("paths"),
+                        "warning.config.recipe.smithing_transform.post_processor.keep_custom_data.missing_paths")
+                );
+                return new KeepCustomData(paths.stream().map(it -> it.split("\\.")).toList());
+            }
+        }
+    }
+
     public static class KeepComponents implements ItemDataProcessor {
         public static final Factory FACTORY = new Factory();
         private final List<Key> components;
@@ -339,6 +374,7 @@ public class CustomSmithingTransformRecipe<T> extends AbstractedFixedResultRecip
         }
 
         public static class Factory implements ProcessorFactory {
+            private static final Key CUSTOM_DATA = Key.of("minecraft", "custom_data");
 
             @Override
             public ItemDataProcessor create(Map<String, Object> arguments) {
@@ -347,7 +383,7 @@ public class CustomSmithingTransformRecipe<T> extends AbstractedFixedResultRecip
                     throw new LocalizedResourceConfigException("warning.config.recipe.smithing_transform.post_processor.keep_component.missing_components");
                 }
                 List<String> components = MiscUtils.getAsStringList(componentsObj);
-                return new KeepComponents(components.stream().map(Key::of).toList());
+                return new KeepComponents(components.stream().map(Key::of).filter(it -> !CUSTOM_DATA.equals(it)).toList());
             }
         }
     }