Abstract: In view of the new problems in China’s energy field in recent years,such as a large number of renewable energy connected and consumed,source-grid-load linkage,improving efficiency of power grid data processing,enhancing ability of power grid risk prevention,etc. this paper proposes to build a comprehensive intelligent grid dispatching cloud computing platform by using power big data and cloud computing technology. With the help of the dispatching cloud computing platform,the processing efficiency of large data is enhanced,and the power resources are allocated rationally. This paper expounds the working principle of dispatching cloud computing platform,and combines the dispatching structure of power grid with meteorological,geological,hydrological,positioning,image recognition and other external information to form a dispatching cloud application platform. Taking the provincial power dispatching as an example,according to the provincial grid demand and dispatching function,the function modules are designed,further more,the provincial grid dispatching cloud computing platform is constructed. By the experiments,we can see that the dispatching cloud computing platform has advantages in dispatching data processing. Finally,the implementation of the dispatch cloud computing platform is discussed and the prerequisites for the implementation of the dispatch cloud computing platform are elaborated.