As an important component of security systems, the number of video surveillance systems is growing rapidly year by year. However, video surveillance systems often have many network security problems, and there is no perfect solution at present. To address these security issues, we propose a TPM-based security enhancement design for video surveillance systems. We enhance the security of the video surveillance system from the perspective of its own environmental security, video data security and device authentication, combined with the TPM module s trusted metrics, trusted authentication and key management mechanisms. We have developed and implemented a prototype video surveillance system and conducted experiments. The experimental results show that the framework we designed can greatly enhance the security of the video surveillance system while ensuring performance.