With the development and updating of the Internet, network security issues have become diverse, and network attacks have greatly affected our lives. Network anomaly detection plays a pivotal role. Based on the existing network anomaly detection method of China Telecom network management platform, this paper proposes an improved network anomaly detection model, and improves the accuracy of network anomaly detection through the analysis of data traffic. Finally, combined with the pilot situation of a branch of China Telecom, a new generation of intelligent analysis model was trained, which verified the effectiveness of the system and provided new insights for optimizing other application systems.