diff --git a/hutool-core/src/main/java/cn/hutool/core/date/DatePattern.java b/hutool-core/src/main/java/cn/hutool/core/date/DatePattern.java
index bbced88d7..7a98e9421 100644
--- a/hutool-core/src/main/java/cn/hutool/core/date/DatePattern.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/DatePattern.java
@@ -121,19 +121,6 @@ public class DatePattern {
 	 */
 	public static final DateTimeFormatter NORM_DATETIME_MS_FORMATTER = createFormatter(NORM_DATETIME_MS_PATTERN);
 
-	/**
-	 * 标准日期时间格式，精确到毫秒：yyyy-MM-dd HH:mm:ss.SSSSSS
-	 */
-	public static final String NORM_DATETIME_MS_FULL_PATTERN = "yyyy-MM-dd HH:mm:ss.SSSSSS";
-	/**
-	 * 标准日期时间格式，精确到毫秒 {@link FastDateFormat}：yyyy-MM-dd HH:mm:ss.SSSSSS
-	 */
-	public static final FastDateFormat NORM_DATETIME_MS_FULL_FORMAT = FastDateFormat.getInstance(NORM_DATETIME_MS_PATTERN);
-	/**
-	 * 标准日期时间格式，精确到毫秒 {@link FastDateFormat}：yyyy-MM-dd HH:mm:ss.SSSSSS
-	 */
-	public static final DateTimeFormatter NORM_DATETIME_MS_FULL_FORMATTER = createFormatter(NORM_DATETIME_MS_PATTERN);
-
 	/**
 	 * ISO8601日期时间格式，精确到毫秒：yyyy-MM-dd HH:mm:ss,SSS
 	 */
diff --git a/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java b/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
index ea6a4e6c9..36bb5b146 100644
--- a/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
@@ -960,14 +960,15 @@ public class DateUtil extends CalendarUtil {
 					// yyyy-MM-dd HH:mm
 					return parse(dateStr, DatePattern.NORM_DATETIME_MINUTE_FORMAT);
 				case 2:
-					if (StrUtil.contains(dateStr, CharUtil.DOT)) {
-						if (dateStr.length() == DatePattern.NORM_DATETIME_MS_PATTERN.length()) {
-							// yyyy-MM-dd HH:mm:ss.SSS
-							return parse(dateStr, DatePattern.NORM_DATETIME_MS_FORMAT);
-						} else {
-							// yyyy-MM-dd HH:mm:ss.SSSSSS
-							return parse(dateStr, DatePattern.NORM_DATETIME_MS_FULL_FORMAT);
+					final int indexOfDot = StrUtil.indexOf(dateStr, CharUtil.DOT);
+					if (indexOfDot > 0) {
+						final int length1 = dateStr.length();
+						// yyyy-MM-dd HH:mm:ss.SSS 或者 yyyy-MM-dd HH:mm:ss.SSSSSS
+						if(length1 - indexOfDot > 4) {
+							// 类似yyyy-MM-dd HH:mm:ss.SSSSSS，采取截断操作
+							dateStr = StrUtil.subPre(dateStr, indexOfDot + 4);
 						}
+						return parse(dateStr, DatePattern.NORM_DATETIME_MS_FORMAT);
 					}
 					// yyyy-MM-dd HH:mm:ss
 					return parse(dateStr, DatePattern.NORM_DATETIME_FORMAT);
diff --git a/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
index 515a0ede4..c1fdaba0c 100644
--- a/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
@@ -460,18 +460,34 @@ public class DateUtilTest {
 	 * 测试支持：yyyy-MM-dd HH:mm:ss.SSSSSS 格式
 	 */
 	@Test
-	public void parseTest9() {
+	public void parseNormFullTest() {
 		String str = "2020-02-06 01:58:00.000020";
 		DateTime dateTime = DateUtil.parse(str);
-		assert dateTime != null;
+		Assert.assertNotNull(dateTime);
+		Assert.assertEquals("2020-02-06 01:58:00.000", dateTime.toString(DatePattern.NORM_DATETIME_MS_PATTERN));
+
+		str = "2020-02-06 01:58:00.00002";
+		dateTime = DateUtil.parse(str);
+		Assert.assertNotNull(dateTime);
+		Assert.assertEquals("2020-02-06 01:58:00.000", dateTime.toString(DatePattern.NORM_DATETIME_MS_PATTERN));
+
+		str = "2020-02-06 01:58:00.111000";
+		dateTime = DateUtil.parse(str);
+		Assert.assertNotNull(dateTime);
+		Assert.assertEquals("2020-02-06 01:58:00.111", dateTime.toString(DatePattern.NORM_DATETIME_MS_PATTERN));
+
+		str = "2020-02-06 01:58:00.111";
+		dateTime = DateUtil.parse(str);
+		Assert.assertNotNull(dateTime);
+		Assert.assertEquals("2020-02-06 01:58:00.111", dateTime.toString(DatePattern.NORM_DATETIME_MS_PATTERN));
 	}
 
 	/**
 	 * 测试字符串是空，返回null, 而不是直接报错；
 	 */
 	@Test
-	public void parseTest10() {
-		String str = "";
+	public void parseEmptyTest() {
+		String str = " ";
 		DateTime dateTime = DateUtil.parse(str);
 		Assert.assertNull(dateTime);
 	}