The invention provides a power information physical system joint simulation platform based on an advanced digital power real-time simulator ADPSS and a simulation method. According to the platform andthe method, an ADPSS-based power simulation unit is used as a main body; the platform is integrated with a platform control unit, a data transmission unit, a communication simulation unit and a control unit, wherein the platform control unit performs system configuration of joint simulation, starts electric power information physical system simulation and displays a simulation process and a simulation result, and the electric power simulation unit performs joint simulation with the communication simulation unit and the control unit in real time synchronously through the data transmission unit. According to the simulation platform and the simulation method, model design and real-time data transmission in the ADPSS-based simulation framework of the electric power information physical systemare realized; a platform is provided for joint simulation of a power grid and a communication network, and the system and the method are based on the existing software architecture of the ADPSS and are easy to develop and implement, and meanwhile, the independence of the ADPSS and a communication simulation unit is kept.