Aiming at the problems of low head and low efficiency of a high‑speed centrifugal pump used for cooling specific equipment under strict space constraints，a study on cavitation characteristic analysis and inducer wrap angle optimization was carried out.The reliability of the numerical analysis results of the pump was verified by comparing the experimental test results with the simulation calculation results.Based on the basic cavitation equation，cavitation specific speed and suction specific speed methods，the required net positive suction head （NPSH_r） of the pump was initially calculated.Combined with the CFD cavitation flow field simulation，the accuracy of the theoretical calculation results and the critical conditions for cavitation occurrence were clarified.On this basis，an inducer was designed，and the effects of wrap angles （ranging from 100° to 200°） on the performance of the inducer and the entire pump were systematically studied.The results show that the inducer wrap angle has a significant impact on the head and efficiency of both the inducer itself and the entire pump.When the wrap angle is 140°，the inducer achieves the optimal efficiency and provides a head of 11.86 m，which can meet the anti‑cavitation requirements.After assembling this inducer，the head of the optimized entire pump is increased to 71.29 m，and the efficiency reaches 81.76%，which are 4.47% and 5.44% higher than those before optimization，respectively.In addition，the critical cavitation point shifts leftward after optimization，and the available net positive suction head （NPSH_a） increases to 21.37 m，with an increase of about 1.25 times，indicating that the anti‑cavitation capacity of the system is significantly enhanced，and both the head and efficiency meet the design requirements.This study can provide a theoretical basis and engineering reference for the high‑performance design of high‑speed centrifugal pumps under lightweight constraints.