Abstract: Along with the new round of electricity market reform,the supply of electricity has been gradually transformed from traditional planning mode to market trading mode.Faced with complex market variations,the technical support system of electricity trading has made some new requirements regarded as the joint operation of"spot+ medium and long term "market,the Internet-oriented high concurrent access,the standardized market model,the external system information exchange and the transaction security guarantee.In addition,a four-major-application business architecture is proposed,which is adapted to the characteristics of China’s electricity market,with a two-tier-coordination platform architecture based on"hybrid cloud".Finally,the key technical problems that need to be solved in system expansion are discussed.