Abstract: To meet the needs of collaborative decision making, considering the demands of air traffic control units, airlines and airports, the flight recovery problem of flight delay and violation of airport curfew due to the decline of airport capacity is studied. Considering the interests of airlines and passengers, a multi-objective cooperative slot secondary assignment model is proposed to minimize the total delay cost of airlines and the total delay time of passengers. Finally, combining with the flight delay data of an airport, the feasibility and effectiveness of the proposed model are solved and verified, and the sensitivity analysis is made. The results show that the multi-objective flight recovery model can be more efficient in resource optimization and task scheduling, especially in alleviating the delay time of heavy and medium aircraft. The time slot utilization efficiency is significantly improved, and the optimization of the allocation result increases more than 26% under the condition of limited airport capacity, effectively reducing the impact of curfew on the normal operation of flights, and providing a scientific and reasonable theoretical basis for airlines to carry out the second allocation of time slots.