Abstract: In allusion to the problems in the container cloud platform such as the plaintext display of container cloud data, malware implantation, container arrangement failure and attacks on container host caused by internal and external networks, the technical characteristics of blockchain technology concerning certificate storage, traceability, smart contract and asymmetric encryption are applied to build a virtual chain in the cloud platform, which chains the network security events occurred in the operation of container cloud, configure the distribution function of container based on blockchain technology, and manage the life-cycle data of container,so as to realize the application of distributed technology in the cloud computing platform, optimize the existing security management framework of container cloud, and improve the robustness of security protection of the cloud platform.