diff --git a/packages/okam-build/lib/processor/css/postcss-plugin-wx2swan.js b/packages/okam-build/lib/processor/css/postcss-plugin-wx2swan.js
new file mode 100644
index 00000000..4b04e24b
--- /dev/null
+++ b/packages/okam-build/lib/processor/css/postcss-plugin-wx2swan.js
@@ -0,0 +1,25 @@
+/**
+ * @file postcss plugin px2rpx
+ * @author xiaohong8023@outlook.com
+ */
+
+'use strict';
+
+const postcss = require('postcss');
+const path = require('path');
+
+module.exports = postcss.plugin('postcss-plugin-wx2swan', function (opts = {}) {
+
+    let file = opts.file;
+
+    return function (css, result) {
+        css.walkAtRules(rule => {
+            if (rule.name === 'import') {
+                // path.resolve(file.fullPath, );
+                const depRelPath = rule.params.slice(1, -1);
+                rule.params = rule.params.replace(/\.wxss/, '.css');
+                file.addDeps(depRelPath);
+            }
+        });
+    };
+});
diff --git a/packages/okam-build/lib/processor/helper/npm.js b/packages/okam-build/lib/processor/helper/npm.js
index 01ba8667..e91a07e8 100644
--- a/packages/okam-build/lib/processor/helper/npm.js
+++ b/packages/okam-build/lib/processor/helper/npm.js
@@ -15,8 +15,6 @@ function isNpmModuleFile(modulePath) {
 
 function resolveNpmModuleNewPath(oldPath, rebaseDepDir) {
     let newPath = rebaseDepDir + oldPath.substr(DEP_DIR_NAME.length + 1);
-    // replace all `node_modles` to `npm` to fix weixin cannot find the module
-    // if the module path exists `node_module` dir name
     return nodeModulesToNpm(newPath);
 }
 
diff --git a/packages/okam-build/lib/processor/wx2swan/index.js b/packages/okam-build/lib/processor/wx2swan/index.js
index 8e4aec2a..274cd195 100644
--- a/packages/okam-build/lib/processor/wx2swan/index.js
+++ b/packages/okam-build/lib/processor/wx2swan/index.js
@@ -11,7 +11,7 @@ const wx2swanMap = {
         rext: 'swan'
     },
     wxss: {
-        processor: null,
+        processor: require('./wxssTransform'),
         rext: 'css'
     },
     js: {
diff --git a/packages/okam-build/lib/processor/wx2swan/wxssTransform.js b/packages/okam-build/lib/processor/wx2swan/wxssTransform.js
new file mode 100644
index 00000000..5d745429
--- /dev/null
+++ b/packages/okam-build/lib/processor/wx2swan/wxssTransform.js
@@ -0,0 +1,17 @@
+/**
+ * @file The postcss processor
+ * @author xiaohong8023@outlook.com
+ */
+
+'use strict';
+
+const postcssProcessor = require('../css/postcss');
+const wx2swanPlugin = require('../css/postcss-plugin-wx2swan');
+
+module.exports = function (file, options) {
+    let config = options.config;
+    config.plugins = config.plugins || [];
+    config.plugins.push(wx2swanPlugin.bind(this, {file}));
+    return postcssProcessor(file, options);
+};
+