diff --git a/build.py b/build.py
index fad3f15..c3de841 100644
--- a/build.py
+++ b/build.py
@@ -28,6 +28,18 @@ build_config = {
     "family_name": "Maple Mono",
     # whether to use hinted ttf as base font
     "use_hinted": True,
+    "feature_freeze": {
+        "cv01": "ignore",
+        "cv02": "ignore",
+        "cv03": "ignore",
+        "cv04": "ignore",
+        "cv98": "ignore",
+        "cv99": "ignore",
+        "ss01": "ignore",
+        "ss02": "ignore",
+        "ss03": "ignore",
+        "ss04": "ignore",
+    },
     # nerd font settings
     "nerd_font": {
         # whether to enable Nerd Font
@@ -283,6 +295,53 @@ def add_cv98(font):
                 lang_sys_rec.LangSys.FeatureIndex.append(feature_index)
 
 
+def freeze_feature(font: TTFont):
+    # check feature list
+    feature_record = font["GSUB"].table.FeatureList.FeatureRecord
+    feature_dict = {
+        feature.FeatureTag: feature.Feature
+        for feature in feature_record
+        if feature.FeatureTag != "calt"
+    }
+
+    calt_features = [
+        feature.Feature for feature in feature_record if feature.FeatureTag == "calt"
+    ]
+
+    # Process features
+    for feature_tag, status in build_config["feature_freeze"].items():
+        feature = feature_dict.get(feature_tag)
+        if not feature or status == "ignore":
+            continue
+
+        if status == "disable":
+            feature.LookupListIndex = []
+            continue
+
+        if feature_tag in ["ss03"]:
+            # Enable by moving rules into "calt"
+            for calt_feat in calt_features:
+                calt_feat.LookupListIndex.extend(feature.LookupListIndex)
+        else:
+            # Enable by replacing data in glyf and hmtx tables
+            glyph_dict = font["glyf"].glyphs
+            hmtx_dict = font["hmtx"].metrics
+            for index in feature.LookupListIndex:
+                lookup = font["GSUB"].table.LookupList.Lookup[index]
+                for old_key, new_key in lookup.SubTable[0].mapping.items():
+                    if (
+                        old_key in glyph_dict
+                        and old_key in hmtx_dict
+                        and new_key in glyph_dict
+                        and new_key in hmtx_dict
+                    ):
+                        glyph_dict[old_key] = glyph_dict[new_key]
+                        hmtx_dict[old_key] = hmtx_dict[new_key]
+                    else:
+                        print(f"{old_key} or {new_key} does not exist")
+                        return
+
+
 def build_mono(f: str):
     _path = path.join(output_ttf, f)
     font = TTFont(_path)
@@ -314,6 +373,8 @@ def build_mono(f: str):
     elif style_name1 == " ExtraLight":
         font["OS/2"].usWeightClass = 275
 
+    freeze_feature(font)
+
     font.save(_path)
     font.close()
     run(f"ftcli converter ttf2otf {_path} -out {output_otf}")
diff --git a/config.json b/config.json
index 606a52e..1665a08 100644
--- a/config.json
+++ b/config.json
@@ -2,6 +2,18 @@
   "$schema": "./source/schema.json",
   "family_name": "Maple Mono",
   "use_hinted": true,
+  "feature_freeze": {
+    "cv01": "ignore",
+    "cv02": "ignore",
+    "cv03": "ignore",
+    "cv04": "ignore",
+    "cv98": "ignore",
+    "cv99": "ignore",
+    "ss01": "ignore",
+    "ss02": "ignore",
+    "ss03": "ignore",
+    "ss04": "ignore"
+  },
   "nerd_font": {
     "enable": true,
     "version": "3.2.1",
diff --git a/source/schema.json b/source/schema.json
index 24df689..3fdd866 100644
--- a/source/schema.json
+++ b/source/schema.json
@@ -18,6 +18,111 @@
       "description": "Whether to use hinted TTF as base font",
       "default": true
     },
+    "feature_freeze": {
+      "type": "object",
+      "description": "Freeze some font features \n enable: enable font features by default \n disable: remove some font features \n ignore: skip handle target font features",
+      "properties": {
+        "cv01": {
+          "type": "string",
+          "description": "Classic '@', '$', '&', 'Q', '=>', '->'",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "cv02": {
+          "type": "string",
+          "description": "Alternative 'a' (with top alarm)",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "cv03": {
+          "type": "string",
+          "description": "Alternative 'i' (without bottom left bar)",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "cv04": {
+          "type": "string",
+          "description": "Alternative 'l' (with bottom left bar) and '1' (without bottom bar)",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "cv98": {
+          "type": "string",
+          "description": "full width '…'(ellipsis) and '—'(emdash) support for Maple Mono NF CN",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "cv99": {
+          "type": "string",
+          "description": "Traditional punctuations support for Maple Mono NF CN",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "ss01": {
+          "type": "string",
+          "description": "Non-cursive italic style",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "ss02": {
+          "type": "string",
+          "description": "Disable ligautures on equals like '==', '!=', '<='",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "ss03": {
+          "type": "string",
+          "description": "Ignore cases on all tags",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "ss04": {
+          "type": "string",
+          "description": "Disable ligatures on '__', '#__', '***'",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        },
+        "zero": {
+          "type": "string",
+          "description": "Dot style '0'",
+          "enum": [
+            "ignore",
+            "disable",
+            "enable"
+          ]
+        }
+      }
+    },
     "nerd_font": {
       "type": "object",
       "description": "Config for Nerd Font",
@@ -47,7 +152,9 @@
           "items": {
             "type": "string"
           },
-          "default": ["--complete"],
+          "default": [
+            "--complete"
+          ],
           "description": "Symbol Fonts settings. if is not [\"--complete\"], will use font-patcher to generate fonts. Full args: https://github.com/ryanoasis/nerd-fonts?tab=readme-ov-file#font-patcher"
         },
         "extra_args": {