diff --git a/README.md b/README.md
index f62343f..7dacc12 100644
--- a/README.md
+++ b/README.md
@@ -111,6 +111,7 @@ Default:
   unitPrecision: 5,
   propWhiteList: [],
   propBlackList: [],
+  exclude:false,
   selectorBlackList: [],
   ignoreIdentifier: false,
   replace: true,
@@ -128,6 +129,7 @@ Default:
     - Values need to be exact matches.
 - `propBlackList` (Array) The properties that should not change from px to rem.
     - Values need to be exact matches.
+- `exclude` (Reg)  a way to exclude some folder,eg. /(node_module)/.
 - `selectorBlackList` (Array) The selectors to ignore and leave as px.
     - If value is string, it checks to see if selector contains the string.
         - `['body']` will match `.body-class`
diff --git a/src/index.js b/src/index.js
index d30aa0e..264041b 100644
--- a/src/index.js
+++ b/src/index.js
@@ -90,13 +90,15 @@ export default postcss.plugin('postcss-plugin-px2rem', options => {
   return css => {
     css.walkDecls((decl, i) => {
       const _decl = decl;
-      // 1st check 'px'
+      // 1st check exclude
+      if (opts.exclude && css.source.input.file && css.source.input.file.match(opts.exclude) !== null) return;
+      // 2st check 'px'
       if (_decl.value.indexOf('px') === -1) return;
-      // 2nd check property black list
+      // 3nd check property black list
       if (blacklistedProp(opts.propBlackList, _decl.prop)) return;
-      // 3rd check property white list
+      // 4rd check property white list
       if (opts.propWhiteList.length && opts.propWhiteList.indexOf(_decl.prop) === -1) return;
-      // 4th check seletor black list
+      // 5th check seletor black list
       if (blacklistedSelector(opts.selectorBlackList, _decl.parent.selector)) return;
 
       const value = _decl.value.replace(pxRegex, pxReplace);
diff --git a/test/index-test.js b/test/index-test.js
index ceb43d2..c25f4df 100644
--- a/test/index-test.js
+++ b/test/index-test.js
@@ -216,7 +216,7 @@ describe('minPixelValue', () => {
   });
 });
 
-describe('rpx support', function() {
+describe('rpx support', function () {
   it('should work on the readme example', () => {
     const input = 'h1 { margin: 0 0 20rpx 20rpx; font-size: 32px; line-height: 1.2; letter-spacing: 1rpx; }';
     const output = 'h1 { margin: 0 0 0.2rem 0.2rem; font-size: 0.64rem; line-height: 1.2; letter-spacing: 0.01rem; }';
@@ -262,3 +262,27 @@ describe('rpx support', function() {
     expect(processed).toBe(output);
   });
 });
+
+describe('exclude support', () => {
+  it('should work on the readme example', () => {
+    const input = 'h1 { margin: 0 0 20px 20px; font-size: 32px; line-height: 1.2; letter-spacing: 1px; }';
+    const output = 'h1 { margin: 0 0 20px 20px; font-size: 32px; line-height: 1.2; letter-spacing: 1px; }';
+    const processed = postcss(pxtorem({
+      exclude: /(node_modules)/,
+    })).process(input, {
+      from: 'node_modules/third.css',
+    }).css;
+    expect(processed).toBe(output);
+  });
+
+  it('should work when exclude option range doesn\'t cover', () => {
+    const input = 'h1 { margin: 0 0 20px 20px; font-size: 32px; line-height: 1.2; letter-spacing: 1px; }';
+    const output = 'h1 { margin: 0 0 0.2rem 0.2rem; font-size: 0.32rem; line-height: 1.2; letter-spacing: 0.01rem; }';
+    const processed = postcss(pxtorem({
+      exclude: /(node_modules)/,
+    })).process(input, {
+      from: 'lib/own.css',
+    }).css;
+    expect(processed).toBe(output);
+  });
+});