As the foundation component of cloud computing platform,the virtual machine(VM)is confronted with numerous security threats.However,existing solutions tend to focus on solving the threat in a specific state of VM.In this paper,we propose a novel VM lifecycle security protection framework based on trusted computing to solve the security threats of VM in the entire lifecycle.Specifically,a concept of VM lifecycle is presented by dividing the different active conditions of the VM.Then,a trusted-computing-based security protection framework is further developed,which can extend the trusted relationship from trusted platform module to VM and protect the security and reliability of VM in the lifecycle.The theoretical analysis shows that our proposed framework can provide comprehensive safety to VM in lifecycle.Furthermore,the experiment results are provided to demonstrate that the proposed framework is feasible and archives a higher level of security compared with some state-of-the-art schemes.