Distributed Energy(DES) is a major trend in many countries. As one of the important ways to aggregate various types of distributed power sources, virtual power plants(VPP) have important value. therefore, this paper conducts complex network modeling for virtual power plant distribution network, evaluates the energy efficiency index of virtual power plant distribution network based on the average path in complex network theory, and analyzes it under the actual 69-node distribution network topology. The energy efficiency indicators of the rights and non-weights and the impact of the virtual power plant and distribution network interface and the number of virtual power plants in the distribution network on the indicators. At present, there are many studies on the impact of microgrid access on the distribution network, but little research on the impact of virtual power plants, so this paper also compares the changes of the average path when the microgrid and the virtual power plants are simultaneously connected to different nodes of the distribution network. Therefore, this paper has important reference value for evaluating the impact of virtual power plants on the distribution network.