Abstract: The State Grid Corporation of China has proposed the construction of a new power system under the background of dual-carbon policy. The main distribution network integrated dispatching supports the development of the fullvoltage and flat power grid regulation business of the provincial power grid, providing a strong guarantee for the safe and efficient operation of the new power system.This paper proposes a comprehensive simulation power grid platform construction scheme based on the integration of main distribution and network distribution, which provides accurate and effective data drive for the practical training and simulation system of main network dispatching, distribution network dispatching, substation operation and maintenance of provincial training centers.