diff --git a/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java b/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java
index ca075472f..64a3d6c4b 100644
--- a/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/math/NumberUtil.java
@@ -303,7 +303,7 @@ public class NumberUtil {
 	 * @return 新值
 	 */
 	public static String roundStr(final double v, final int scale) {
-		return round(v, scale).toString();
+		return round(v, scale).toPlainString();
 	}
 
 	/**
@@ -344,7 +344,7 @@ public class NumberUtil {
 	 * @since 3.2.2
 	 */
 	public static String roundStr(final String numberStr, final int scale) {
-		return round(numberStr, scale).toString();
+		return round(numberStr, scale).toPlainString();
 	}
 
 	/**
@@ -371,7 +371,7 @@ public class NumberUtil {
 	 * @since 3.2.2
 	 */
 	public static String roundStr(final double v, final int scale, final RoundingMode roundingMode) {
-		return round(v, scale, roundingMode).toString();
+		return round(v, scale, roundingMode).toPlainString();
 	}
 
 	/**
@@ -425,7 +425,7 @@ public class NumberUtil {
 	 * @since 3.2.2
 	 */
 	public static String roundStr(final String numberStr, final int scale, final 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 75813a52a..924fb95b8 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
@@ -161,6 +161,9 @@ 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