Based on the initial design of 64 groups of refueling assembly at Haiyang Nuclear Power Plant (HNPP), a long-term refueling management strategy (RMS) study was conducted using the COSINE software package, and a refueling management plan for 92 groups of new fuel assembly was designed. On this basis, simulation calculations were conducted on the main core parameters of the 3rd to 8th cycles, and universal design limits were verified. The simulation calculation results show that HNPP has the refueling capability of 92 new fuel assembly, and the designed refueling plan satisfies the design limits and requirements.