diff --git a/hutool-core/src/main/java/cn/hutool/core/convert/impl/DateConverter.java b/hutool-core/src/main/java/cn/hutool/core/convert/impl/DateConverter.java
index f659f42bd..cbd2dbd7b 100644
--- a/hutool-core/src/main/java/cn/hutool/core/convert/impl/DateConverter.java
+++ b/hutool-core/src/main/java/cn/hutool/core/convert/impl/DateConverter.java
@@ -62,6 +62,9 @@ public class DateConverter extends AbstractConverter<java.util.Date> {
 
 	@Override
 	protected java.util.Date convertInternal(Object value) {
+		if (value == null || (value instanceof CharSequence && StrUtil.isBlank(value.toString()))) {
+			return null;
+		}
 		if (value instanceof TemporalAccessor) {
 			return wrap(DateUtil.date((TemporalAccessor) value));
 		} else if (value instanceof Calendar) {
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 4107fb2a8..bbced88d7 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
@@ -18,6 +18,7 @@ public class DatePattern {
 	/**
 	 * 标准日期时间正则，每个字段支持单个数字或2个数字，包括：
 	 * <pre>
+	 *     yyyy-MM-dd HH:mm:ss.SSSSSS
 	 *     yyyy-MM-dd HH:mm:ss.SSS
 	 *     yyyy-MM-dd HH:mm:ss
 	 *     yyyy-MM-dd HH:mm
@@ -26,7 +27,7 @@ public class DatePattern {
 	 *
 	 * @since 5.3.6
 	 */
-	public static final Pattern REGEX_NORM = Pattern.compile("\\d{4}-\\d{1,2}-\\d{1,2}(\\s\\d{1,2}:\\d{1,2}(:\\d{1,2})?)?(.\\d{1,3})?");
+	public static final Pattern REGEX_NORM = Pattern.compile("\\d{4}-\\d{1,2}-\\d{1,2}(\\s\\d{1,2}:\\d{1,2}(:\\d{1,2})?)?(.\\d{1,6})?");
 
 	//-------------------------------------------------------------------------------------------------------------------------------- Normal
 	/**
@@ -120,6 +121,19 @@ 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 865c27c6b..ea6a4e6c9 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
@@ -899,6 +899,7 @@ public class DateUtil extends CalendarUtil {
 	 * <li>HH时mm分ss秒</li>
 	 * <li>yyyy-MM-dd HH:mm</li>
 	 * <li>yyyy-MM-dd HH:mm:ss.SSS</li>
+	 * <li>yyyy-MM-dd HH:mm:ss.SSSSSS</li>
 	 * <li>yyyyMMddHHmmss</li>
 	 * <li>yyyyMMddHHmmssSSS</li>
 	 * <li>yyyyMMdd</li>
@@ -928,7 +929,7 @@ public class DateUtil extends CalendarUtil {
 				return parse(dateStr, DatePattern.PURE_DATETIME_FORMAT);
 			} else if (length == DatePattern.PURE_DATETIME_MS_PATTERN.length()) {
 				return parse(dateStr, DatePattern.PURE_DATETIME_MS_FORMAT);
-			} else if (length == DatePattern.PURE_DATE_PATTERN.length()) {
+			}else if (length == DatePattern.PURE_DATE_PATTERN.length()) {
 				return parse(dateStr, DatePattern.PURE_DATE_FORMAT);
 			} else if (length == DatePattern.PURE_TIME_PATTERN.length()) {
 				return parse(dateStr, DatePattern.PURE_TIME_FORMAT);
@@ -960,8 +961,13 @@ public class DateUtil extends CalendarUtil {
 					return parse(dateStr, DatePattern.NORM_DATETIME_MINUTE_FORMAT);
 				case 2:
 					if (StrUtil.contains(dateStr, CharUtil.DOT)) {
-						// yyyy-MM-dd HH:mm:ss.SSS
-						return parse(dateStr, DatePattern.NORM_DATETIME_MS_FORMAT);
+						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);
+						}
 					}
 					// 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 79e9d638d..515a0ede4 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
@@ -456,6 +456,26 @@ public class DateUtilTest {
 		Assert.assertEquals("2020-06-28 02:14:13", dateTime.toString());
 	}
 
+	/**
+	 * 测试支持：yyyy-MM-dd HH:mm:ss.SSSSSS 格式
+	 */
+	@Test
+	public void parseTest9() {
+		String str = "2020-02-06 01:58:00.000020";
+		DateTime dateTime = DateUtil.parse(str);
+		assert dateTime != null;
+	}
+
+	/**
+	 * 测试字符串是空，返回null, 而不是直接报错；
+	 */
+	@Test
+	public void parseTest10() {
+		String str = "";
+		DateTime dateTime = DateUtil.parse(str);
+		Assert.assertNull(dateTime);
+	}
+
 	@Test
 	public void parseUTCOffsetTest() {
 		// issue#I437AP@Gitee