China is fully developing the construction of the Spot market of electric power. The spot pilot areas have built a relatively complete Spot market operation support system in combination with the current market rules and the current status of the power system, which supports the effective operation of the current Spot market of electric power. With the gradual increase of the proportion of new energy in the construction of new power systems and the implementation of the "dual carbon" national strategy, the existing operational technology support system will not be able to meet the needs of future market development. On the basis of summarizing the technical practice of China"s power Spot market, this paper analyzes the changes in the characteristics of the power Spot market and the technical challenges it faces, and discusses the key technologies in the future in the aspects of multi-agent modeling access, Market clearing algorithm, market risk analysis, trusted trading environment, market simulation, etc. Some technologies have been initially applied.