The invention discloses a host safeguarding method and device and belongs to the technical field of virtualization; the host safeguard method comprises: acquiring information of virtualization software, issuing a safeguard strategy, monitoring access actions of a virtual machine, intercepting illegal actions, and other steps. The access actions of the virtual machine are correlated to the type and version of virtualization software, whether the actions are secure or not is judged by monitoring the actions of the virtual machine, and unsecure actions are intercepted in time; the host safeguarding method and device have the advantages of good logic simplicity, ease of implementation and good result reliability, comprehensive safeguarding can be provided for a host and virtualization software without changing existing Hypervisor code, and the host safeguarding method and device are a new path compared to the prior art and belong to a major modification to the prior art.