diff --git a/one-java-agent-plugin/src/main/java/com/alibaba/oneagent/utils/IOUtils.java b/one-java-agent-plugin/src/main/java/com/alibaba/oneagent/utils/IOUtils.java
index fb42dc1..eaf2f97 100644
--- a/one-java-agent-plugin/src/main/java/com/alibaba/oneagent/utils/IOUtils.java
+++ b/one-java-agent-plugin/src/main/java/com/alibaba/oneagent/utils/IOUtils.java
@@ -103,60 +103,4 @@ public static IOException close(URLClassLoader urlClassLoader) {
 		return null;
 	}
 
-	public static void unzip(String zipFile, String extractFolder) throws IOException {
-		File file = new File(zipFile);
-		ZipFile zip = null;
-		try {
-			int BUFFER = 1024 * 8;
-
-			zip = new ZipFile(file);
-			String newPath = extractFolder;
-
-			new File(newPath).mkdir();
-			Enumeration<? extends ZipEntry> zipFileEntries = zip.entries();
-
-			// Process each entry
-			while (zipFileEntries.hasMoreElements()) {
-				// grab a zip file entry
-				ZipEntry entry = (ZipEntry) zipFileEntries.nextElement();
-				String currentEntry = entry.getName();
-
-				File destFile = new File(newPath, currentEntry);
-				// destFile = new File(newPath, destFile.getName());
-				File destinationParent = destFile.getParentFile();
-
-				// create the parent directory structure if needed
-				destinationParent.mkdirs();
-
-				if (!entry.isDirectory()) {
-					BufferedInputStream is = null;
-					BufferedOutputStream dest = null;
-					try {
-						is = new BufferedInputStream(zip.getInputStream(entry));
-						int currentByte;
-						// establish buffer for writing file
-						byte data[] = new byte[BUFFER];
-
-						// write the current file to disk
-						FileOutputStream fos = new FileOutputStream(destFile);
-						dest = new BufferedOutputStream(fos, BUFFER);
-
-						// read and write until last byte is encountered
-						while ((currentByte = is.read(data, 0, BUFFER)) != -1) {
-							dest.write(data, 0, currentByte);
-						}
-						dest.flush();
-					} finally {
-						close(dest);
-						close(is);
-					}
-
-				}
-
-			}
-		} finally {
-			close(zip);
-		}
-
-	}
 }