diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/TimestampTzLiteral.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/TimestampTzLiteral.java
index f6a8c25a7daa2d..2be7b85071bc69 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/TimestampTzLiteral.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/TimestampTzLiteral.java
@@ -27,9 +27,15 @@
 import org.apache.doris.nereids.types.DataType;
 import org.apache.doris.nereids.types.DateTimeV2Type;
 import org.apache.doris.nereids.types.TimeStampTzType;
+import org.apache.doris.nereids.types.coercion.CharacterType;
+import org.apache.doris.nereids.util.DateUtils;
 import org.apache.doris.qe.ConnectContext;
 
 import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.ZoneOffset;
+import java.time.ZonedDateTime;
+import java.util.Locale;
 import java.util.Objects;
 
 /**
@@ -168,6 +174,8 @@ protected Expression uncheckedCastTo(DataType targetType) throws AnalysisExcepti
         if (targetType.isTimeStampTzType()) {
             return new TimestampTzLiteral((TimeStampTzType) targetType,
                     year, month, day, hour, minute, second, microSecond);
+        } else if (targetType.isStringLikeType()) {
+            return uncheckedCastToString((CharacterType) targetType);
         } else if (targetType.isDateTimeV2Type()) {
             DateTimeV2Literal dtV2Lit = new DateTimeV2Literal((DateTimeV2Type) targetType,
                     year, month, day, hour, minute, second, microSecond);
@@ -180,6 +188,37 @@ protected Expression uncheckedCastTo(DataType targetType) throws AnalysisExcepti
         throw new AnalysisException(String.format("Cast from %s to %s not supported", this, targetType));
     }
 
+    @Override
+    protected String castValueToString() {
+        ZoneId sessionZone = DateUtils.getTimeZone();
+        ZonedDateTime localDateTime = toJavaDateType().atZone(ZoneId.of("UTC")).withZoneSameInstant(sessionZone);
+        return formatDateTime(localDateTime.toLocalDateTime()) + formatOffset(localDateTime.getOffset());
+    }
+
+    private static String formatOffset(ZoneOffset offset) {
+        // Keep FE constant folding aligned with BE TimestampTzValue::to_string()
+        // in be/src/core/value/timestamptz_value.cpp. BE renders the numeric offset
+        // from seconds as sign + HH:MM, instead of using library ids such as "Z".
+        int totalSeconds = offset.getTotalSeconds();
+        int absSeconds = Math.abs(totalSeconds);
+        int hours = absSeconds / 3600;
+        int minutes = (absSeconds % 3600) / 60;
+        return String.format(Locale.ROOT, "%s%02d:%02d", totalSeconds < 0 ? "-" : "+", hours, minutes);
+    }
+
+    private String formatDateTime(LocalDateTime dateTime) {
+        String base = String.format(Locale.ROOT, "%04d-%02d-%02d %02d:%02d:%02d", dateTime.getYear(),
+                dateTime.getMonthValue(), dateTime.getDayOfMonth(), dateTime.getHour(),
+                dateTime.getMinute(), dateTime.getSecond());
+        int scale = getDataType().getScale();
+        if (scale <= 0) {
+            return base;
+        }
+        long scaledMicroSecond = (dateTime.getNano() / 1000)
+                / (int) Math.pow(10, TimeStampTzType.MAX_SCALE - scale);
+        return base + "." + String.format(Locale.ROOT, "%0" + scale + "d", scaledMicroSecond);
+    }
+
     public Expression plusDays(long days) {
         return fromJavaDateType(toJavaDateType().plusDays(days), getDataType().getScale());
     }
diff --git a/fe/fe-core/src/test/java/org/apache/doris/nereids/trees/expressions/literal/TimestampTzLiteralTest.java b/fe/fe-core/src/test/java/org/apache/doris/nereids/trees/expressions/literal/TimestampTzLiteralTest.java
index a1961a61fbb1fe..2bccf146608ea9 100644
--- a/fe/fe-core/src/test/java/org/apache/doris/nereids/trees/expressions/literal/TimestampTzLiteralTest.java
+++ b/fe/fe-core/src/test/java/org/apache/doris/nereids/trees/expressions/literal/TimestampTzLiteralTest.java
@@ -17,14 +17,26 @@
 
 package org.apache.doris.nereids.trees.expressions.literal;
 
+import org.apache.doris.nereids.rules.expression.rules.FoldConstantRuleOnFE;
+import org.apache.doris.nereids.trees.expressions.Cast;
 import org.apache.doris.nereids.trees.expressions.Expression;
+import org.apache.doris.nereids.types.CharType;
+import org.apache.doris.nereids.types.StringType;
 import org.apache.doris.nereids.types.TimeStampTzType;
+import org.apache.doris.nereids.types.VarcharType;
+import org.apache.doris.qe.ConnectContext;
 
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
 class TimestampTzLiteralTest {
 
+    @AfterEach
+    void tearDown() {
+        ConnectContext.remove();
+    }
+
     @Test
     void testConstructorsAndParsing() {
         TimestampTzLiteral literal;
@@ -300,4 +312,50 @@ void testPlusSecondMicrosecond() {
         Assertions.assertEquals(58, result.second);
         Assertions.assertEquals(900000, result.microSecond);
     }
+
+    @Test
+    void testCastToStringUsesSessionTimeZone() throws Exception {
+        setSessionTimeZone("+12:34");
+        TimestampTzLiteral literal = new TimestampTzLiteral(
+                TimeStampTzType.SYSTEM_DEFAULT, 2023, 7, 13, 19, 26, 0, 0);
+        Assertions.assertEquals("2023-07-13 19:26:00", literal.getStringValue());
+
+        Expression folded = FoldConstantRuleOnFE.evaluate(new Cast(literal, StringType.INSTANCE), null);
+        Assertions.assertInstanceOf(StringLiteral.class, folded);
+        Assertions.assertEquals("2023-07-14 08:00:00+12:34",
+                ((StringLiteral) folded).getStringValue());
+
+        Expression varchar = literal.uncheckedCastTo(VarcharType.createVarcharType(64));
+        Assertions.assertInstanceOf(VarcharLiteral.class, varchar);
+        Assertions.assertEquals("2023-07-14 08:00:00+12:34",
+                ((VarcharLiteral) varchar).getStringValue());
+
+        Expression character = literal.uncheckedCastTo(CharType.createCharType(64));
+        Assertions.assertInstanceOf(CharLiteral.class, character);
+        Assertions.assertEquals("2023-07-14 08:00:00+12:34",
+                ((CharLiteral) character).getStringValue());
+
+        setSessionTimeZone("+00:00");
+        Expression utcFolded = FoldConstantRuleOnFE.evaluate(new Cast(literal, StringType.INSTANCE), null);
+        Assertions.assertInstanceOf(StringLiteral.class, utcFolded);
+        Assertions.assertEquals("2023-07-13 19:26:00+00:00",
+                ((StringLiteral) utcFolded).getStringValue());
+    }
+
+    @Test
+    void testCastToStringPreservesScale() {
+        setSessionTimeZone("+12:34");
+        TimestampTzLiteral literal = new TimestampTzLiteral("2023-07-13 22:28:18.456789+05:00");
+
+        Expression folded = FoldConstantRuleOnFE.evaluate(new Cast(literal, StringType.INSTANCE), null);
+        Assertions.assertInstanceOf(StringLiteral.class, folded);
+        Assertions.assertEquals("2023-07-14 06:02:18.456789+12:34",
+                ((StringLiteral) folded).getStringValue());
+    }
+
+    private void setSessionTimeZone(String timeZone) {
+        ConnectContext context = new ConnectContext();
+        context.getSessionVariable().setTimeZone(timeZone);
+        context.setThreadLocalInfo();
+    }
 }