The invention provides a secure communication method of a distributed energy Internet informatization front end. The method comprises the following steps: transmitting distributed energy operation data to a master station end; using a client to perform data interaction of energy Internet mobile application service, wherein the client comprises a mobile terminal and a wireless intelligent communication terminal used for performing data collection and control on an onsite measurement and control apparatus and an intelligent device; and performing communication security protection on a master station access layer, a local area network gateway layer and an informatization front end layer. As the distributed energy operation data are transmitted to the master station end, and the client is applied to the data interaction of the energy Internet mobile application service, energy Internet scheduling transaction and information interaction can be successfully achieved; because of the communication security protection of the master station access layer, the local area network gateway layer and the informatization front end layer, secure and reliable data interaction is achieved, the communication requirements of automatic data access of renewable energy sources and service application mobility are satisfied, and security assurance is provided for secure and reliable operation of the power grid.