The invention provides a mimetic defense-based network function deploying method in a software defined network. The method comprises the following steps: 1, virtual network functions are deployed on adata plane through a virtualization technology; 2, based on a mimetic architecture, a heterogeneous executor pool, a dispatcher and an adjudicator part are constructed on a control plane; 3, the dispatcher performs dynamic dispatching on heterogeneous executors in the heterogeneous executor pool based on business requirements of an application plane, and a business deployment strategy flow tablefile is generated; 4, the adjudicator adjudicates the business deployment strategy flow table file and outputs the number of the selected heterogeneous executor to the heterogeneous executor pool; and5, the heterogeneous executor pool controls the selected heterogeneous executor to issue the business deployment strategy flow table file to the data plane according to the number of the selected heterogeneous executor, and the business deployment strategy flow table file is guided to complete deployment of the network functions through the virtual network functions.