Abstract: Large-scaled integrated Pumped-hydro storage (PHS)-Wind-Solar power generation system is an important way to achieve our country's goal of ‘peaking carbon dioxide emissions by 2030, carbon neutral by 2060’. Through scheduling resources of water, solar, and wind, planning construction of power systems, and optimal dispatch operation, the comprehensive economy and clean energy utilization rate can be effectively improved, and the development of clean energy scale, power quality and level of competition can be promoted. Relying on the fast response of PHS stations, wind power and photovoltaic are integrated nearby to form a joint system of water, solar and wind, which can fully utilize the capacity of pumped-hydro storage plants, and replace conventional thermal power plants, as well as facilitate the construction of new-stated power systems and transformation to clean and low-carbon energy. However, there are spatiotemporal differences between the clean energy output and the pumping and planting strategy of traditional PHS stations, which bring challenges to the coordinated strategy and economic dispatch method of integrated operation. This paper considers a large-scaled integrated PHS-Wind-Solar power generation system. Firstly, based on the existing price mechanism, with the goal of maximizing the profit, a mixed integer linear model of PHS-Wind-Solar joint optimal dispatch is constructed, and the optimal strategy is obtained. Secondly, a PHS peak-shaving price mechanism considering clean energy is proposed to promote PHS to further its adjustment capacity. This paper selects a integrated PHS-Wind-Solar power generation system in Jiangsu as a case study. The results show that: using the regulating ability of PHS to reasonably match the wind and solar resources, it is possible to realize the multi-energy complementarity of water, solar and wind; formulating a reasonable peak regulation price mechanism can promote PHS to further play the role of peak shaving.