diff --git a/CHANGELOG.md b/CHANGELOG.md
index a62b43cdc..ce282fa98 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 
 -------------------------------------------------------------------------------------------------------------
 
-# 5.7.18 (2021-12-23)
+# 5.7.18 (2021-12-24)
 
 ### 🐣新特性
 * 【core   】     新增CollStreamUtil.groupKeyValue（pr#479@Gitee）
@@ -15,6 +15,7 @@
 * 【core   】     增加CollStreamUtil.groupBy（pr#484@Gitee）
 * 【core   】     增加CollUtil.setValueByMap（pr#482@Gitee）
 * 【core   】     LocalDateTimeUtil增加endOfDay重载（issue#2025@Github）
+* 【core   】     IoCopier增加setFlushEveryBuffer方法（issue#2022@Github）
 * 
 ### 🐞Bug修复
 * 【core   】     LineReadWatcher#onModify文件清空判断问题（issue#2013@Github）
diff --git a/hutool-core/src/main/java/cn/hutool/core/io/copy/IoCopier.java b/hutool-core/src/main/java/cn/hutool/core/io/copy/IoCopier.java
index b477a892e..156da58ee 100755
--- a/hutool-core/src/main/java/cn/hutool/core/io/copy/IoCopier.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/copy/IoCopier.java
@@ -25,6 +25,11 @@ public abstract class IoCopier<S, T> {
 	 */
 	protected StreamProgress progress;
 
+	/**
+	 * 是否每次写出一个buffer内容就执行flush
+	 */
+	protected boolean flushEveryBuffer;
+
 	/**
 	 * 构造
 	 *
@@ -56,4 +61,16 @@ public abstract class IoCopier<S, T> {
 	protected int bufferSize(long count) {
 		return (int) Math.min(this.bufferSize, count);
 	}
+
+	/**
+	 * 设置是否每次写出一个buffer内容就执行flush
+	 *
+	 * @param flushEveryBuffer 是否每次写出一个buffer内容就执行flush
+	 * @return this
+	 * @since 5.7.18
+	 */
+	public IoCopier<S, T> setFlushEveryBuffer(boolean flushEveryBuffer){
+		this.flushEveryBuffer = flushEveryBuffer;
+		return this;
+	}
 }
diff --git a/hutool-core/src/main/java/cn/hutool/core/io/copy/ReaderWriterCopier.java b/hutool-core/src/main/java/cn/hutool/core/io/copy/ReaderWriterCopier.java
index 914cb5fce..07c802650 100755
--- a/hutool-core/src/main/java/cn/hutool/core/io/copy/ReaderWriterCopier.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/copy/ReaderWriterCopier.java
@@ -101,6 +101,9 @@ public class ReaderWriterCopier extends IoCopier<Reader, Writer> {
 				break;
 			}
 			target.write(buffer, 0, read);
+			if(flushEveryBuffer){
+				target.flush();
+			}
 
 			numToRead -= read;
 			total += read;
diff --git a/hutool-core/src/main/java/cn/hutool/core/io/copy/StreamCopier.java b/hutool-core/src/main/java/cn/hutool/core/io/copy/StreamCopier.java
index 170771483..e32cc3404 100755
--- a/hutool-core/src/main/java/cn/hutool/core/io/copy/StreamCopier.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/copy/StreamCopier.java
@@ -100,6 +100,9 @@ public class StreamCopier extends IoCopier<InputStream, OutputStream> {
 				break;
 			}
 			target.write(buffer, 0, read);
+			if(flushEveryBuffer){
+				target.flush();
+			}
 
 			numToRead -= read;
 			total += read;