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With the rapid development of information technology, the cyber security situation is becoming more and more severe. The meteorological department has organized network attack and defence exercises to test and improve the capability of the service security protection system with practical standards. In the drill, the attacking team penetrates the real network and information system of important operational units. Each unit acts as the defender to carry out real-time monitoring and emergency response. Because of the information imbalance between the two sides, the defence is often in a passive situation by using traditional defence means. In order to improve the network defence capability, this paper studies the application of camouflage deception and attack trapping technology in the actual scenario of cyber security in meteorological departments. By adopting a honeypot-based deception trapping platform, an active defence system is constructed to realize the monitoring, analysis and early warning of abnormal network traffic, and trap and trace the source of attackers. Through actual combat tests, the application of deception trapping technology has effectively improved the cyber security defence capability and ensured meteorological operational systems stable and reliable.