Under the background of the new power systems with a large number of distributed new energy sources connected,prosumers with autonomous decision-making ability have become a new type of subject participating in the peak shaving and load shifting ancillary service market. Firstly,considering the characteristics of various flexible resources within the control of the prosumers,a decision-making model is proposed for the prosumers to participate in the peak shaving ancillary service market,in order to form the prosumers’power generation plan for the next day. Secondly,based on the profit-seeking characteristics of prosumers and the psychological differences in economic benefits among different prosumers,an optimal bidding model for prosumers is proposed,which takes into account the sensitivity of the prosumers’winning probability to their bidding price. Finally,a market clearing model was proposed with the goal of minimizing the overall scheduling cost of the system. The study shows that proposed model not only facilitates the alleviation of system peak shaving pressure,but also has the effect of reducing line load pressure and improving node voltage.