diff --git a/hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java
index 77138331c..d5b0945b4 100755
--- a/hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java
@@ -793,7 +793,7 @@ public class NumberUtil {
 	 * @return 新值
 	 */
 	public static String roundStr(double v, int scale) {
-		return round(v, scale).toString();
+		return round(v, scale).toPlainString();
 	}
 
 	/**
@@ -834,7 +834,7 @@ public class NumberUtil {
 	 * @since 3.2.2
 	 */
 	public static String roundStr(String numberStr, int scale) {
-		return round(numberStr, scale).toString();
+		return round(numberStr, scale).toPlainString();
 	}
 
 	/**
@@ -861,7 +861,7 @@ public class NumberUtil {
 	 * @since 3.2.2
 	 */
 	public static String roundStr(double v, int scale, RoundingMode roundingMode) {
-		return round(v, scale, roundingMode).toString();
+		return round(v, scale, roundingMode).toPlainString();
 	}
 
 	/**
@@ -915,7 +915,7 @@ public class NumberUtil {
 	 * @since 3.2.2
 	 */
 	public static String roundStr(String numberStr, int scale, RoundingMode roundingMode) {
-		return round(numberStr, scale, roundingMode).toString();
+		return round(numberStr, scale, roundingMode).toPlainString();
 	}
 
 	/**
diff --git a/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
index ef00bede4..51c246138 100644
--- a/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/util/NumberUtilTest.java
@@ -137,6 +137,9 @@ public class NumberUtilTest {
 	public void roundStrTest() {
 		final String roundStr = NumberUtil.roundStr(2.647, 2);
 		Assert.assertEquals(roundStr, "2.65");
+
+		final String roundStr1 = NumberUtil.roundStr(0, 10);
+		Assert.assertEquals(roundStr1, "0.0000000000");
 	}
 
 	@Test