diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47c605f0f..c8eb67006 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,3 +27,4 @@
 - fix:fix tsf lossless not working bug.
 - fix:fix RestTemplate trace attribute loss bug.
 - fix:fix polaris_namespace is null when using TSF.
+- [fix:fix PolarisContextProperties instantiated twice causing NPE.](https://github.com/Tencent/spring-cloud-tencent/pull/1642)
diff --git a/spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/config/PolarisContextAutoConfiguration.java b/spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/config/PolarisContextAutoConfiguration.java
index 5a9e63031..9c8bd38ae 100644
--- a/spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/config/PolarisContextAutoConfiguration.java
+++ b/spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/config/PolarisContextAutoConfiguration.java
@@ -46,9 +46,15 @@ import org.springframework.core.env.Environment;
  * @author Haotian Zhang
  */
 @ConditionalOnPolarisEnabled
-@EnableConfigurationProperties({PolarisContextProperties.class})
+@EnableConfigurationProperties
 public class PolarisContextAutoConfiguration {
 
+	@Bean
+	@ConditionalOnMissingBean
+	public PolarisContextProperties polarisContextProperties() {
+		return new PolarisContextProperties();
+	}
+
 	@Bean(initMethod = "init")
 	@ConditionalOnMissingBean
 	public PolarisSDKContextManager polarisSDKContextManager(PolarisContextProperties properties, Environment environment, List<PolarisConfigModifier> modifierList) throws PolarisException {
diff --git a/spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/config/PolarisContextProperties.java b/spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/config/PolarisContextProperties.java
index 84db65234..25f5a891a 100644
--- a/spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/config/PolarisContextProperties.java
+++ b/spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/config/PolarisContextProperties.java
@@ -68,7 +68,7 @@ public class PolarisContextProperties {
 	/**
 	 * current server local port.
 	 */
-	@Value("${spring.cloud.polaris.localPort:}")
+	@Value("${spring.cloud.polaris.localPort:0}")
 	private Integer localPort;
 
 	/**