diff --git a/public/react/src/modules/courses/shixunHomework/Listofworks.js b/public/react/src/modules/courses/shixunHomework/Listofworks.js
index 2df71929c..040ef24a1 100644
--- a/public/react/src/modules/courses/shixunHomework/Listofworks.js
+++ b/public/react/src/modules/courses/shixunHomework/Listofworks.js
@@ -1412,7 +1412,6 @@ class Listofworks extends Component {
 				console.log(decodeURIComponent(response.headers['content-disposition'].split('=')[1]));
 				downloadElement.href = href
 				// downloadElement.download = name
-				this.myBase64(response.headers['content-disposition'].split('=')[1]);
 				document.body.appendChild(downloadElement)
 				downloadElement.click()
 				document.body.removeChild(downloadElement) // 下载完成移除元素
diff --git a/public/react/src/modules/courses/shixunHomework/base64.js b/public/react/src/modules/courses/shixunHomework/base64.js
deleted file mode 100644
index 4494a50e3..000000000
--- a/public/react/src/modules/courses/shixunHomework/base64.js
+++ /dev/null
@@ -1,103 +0,0 @@
-function Base64() {
-
-	// private property
-	_keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-
-	// public method for encoding
-	this.encode = function (input) {
-		var output = "";
-		var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
-		var i = 0;
-		input = _utf8_encode(input);
-		while (i < input.length) {
-			chr1 = input.charCodeAt(i++);
-			chr2 = input.charCodeAt(i++);
-			chr3 = input.charCodeAt(i++);
-			enc1 = chr1 >> 2;
-			enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
-			enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
-			enc4 = chr3 & 63;
-			if (isNaN(chr2)) {
-				enc3 = enc4 = 64;
-			} else if (isNaN(chr3)) {
-				enc4 = 64;
-			}
-			output = output +
-				_keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
-				_keyStr.charAt(enc3) + _keyStr.charAt(enc4);
-		}
-		return output;
-	}
-
-	// public method for decoding
-	this.decode = function (input) {
-		var output = "";
-		var chr1, chr2, chr3;
-		var enc1, enc2, enc3, enc4;
-		var i = 0;
-		input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
-		while (i < input.length) {
-			enc1 = _keyStr.indexOf(input.charAt(i++));
-			enc2 = _keyStr.indexOf(input.charAt(i++));
-			enc3 = _keyStr.indexOf(input.charAt(i++));
-			enc4 = _keyStr.indexOf(input.charAt(i++));
-			chr1 = (enc1 << 2) | (enc2 >> 4);
-			chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
-			chr3 = ((enc3 & 3) << 6) | enc4;
-			output = output + String.fromCharCode(chr1);
-			if (enc3 != 64) {
-				output = output + String.fromCharCode(chr2);
-			}
-			if (enc4 != 64) {
-				output = output + String.fromCharCode(chr3);
-			}
-		}
-		output = _utf8_decode(output);
-		return output;
-	}
-
-	// private method for UTF-8 encoding
-	_utf8_encode = function (string) {
-		string = string.replace(/\r\n/g,"\n");
-		var utftext = "";
-		for (var n = 0; n < string.length; n++) {
-			var c = string.charCodeAt(n);
-			if (c < 128) {
-				utftext += String.fromCharCode(c);
-			} else if((c > 127) && (c < 2048)) {
-				utftext += String.fromCharCode((c >> 6) | 192);
-				utftext += String.fromCharCode((c & 63) | 128);
-			} else {
-				utftext += String.fromCharCode((c >> 12) | 224);
-				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
-				utftext += String.fromCharCode((c & 63) | 128);
-			}
-
-		}
-		return utftext;
-	}
-
-	// private method for UTF-8 decoding
-	_utf8_decode = function (utftext) {
-		var string = "";
-		var i = 0;
-		var c = c1 = c2 = 0;
-		while ( i < utftext.length ) {
-			c = utftext.charCodeAt(i);
-			if (c < 128) {
-				string += String.fromCharCode(c);
-				i++;
-			} else if((c > 191) && (c < 224)) {
-				c2 = utftext.charCodeAt(i+1);
-				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
-				i += 2;
-			} else {
-				c2 = utftext.charCodeAt(i+1);
-				c3 = utftext.charCodeAt(i+2);
-				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
-				i += 3;
-			}
-		}
-		return string;
-	}
-}
\ No newline at end of file