Aiming to solve the problem that the training teaching equipment of training course of distributed photovoltaic power station cannot meet the needs of practical teaching, a virtual simulation training platform for design, construction, and operation of photovoltaic power station is developed by using Unity3D engine with a real roof photovoltaic power station project as a typical case from the perspective of virtual simulation teaching. It also introduces the platform's functions, architecture, and key technologies involved in the development process. The application results show that the platform realizes the virtual visualization of the preliminary field exploration of the photovoltaic power station, design, construction, and operation and maintenance of the photovoltaic power station, and has a sound application value for the training of photovoltaic students and related technicians.