Abstract: In order to optimize the key equipment for deep-sea aquaculture cage netting cleaning, based on the cavitation jet principle, we investigated the influence of different geometric parameters of angular nozzles on cavitation jet characteristics to provide a reference for the optimal design of high-efficiency cleaning nozzles. We employed numerical simulation of cavitation water jets for angular nozzles using the Reynolds-Averaged Navier-Stokes (RANS) equations coupled with the Realizable k-ε Turbulence Model, the Volume of Fluid (VOF) Multiphase Flow Model, and the Schnerr-Sauer Cavitation Model. Besides, we designed 25 nozzle schemes with different structural parameters using an orthogonal experimental approach, and analyzed the effects of six parameters (Contraction length, cylindrical section length, diffusion section length, throat diameter, contraction angle, and expansion angle) on cavitation performance. The results indicate that the parameters ranked in descending order of influence on collapse distance: cylindrical section diameterd＞diverging angle\theta ＞contraction lengthL_2＞diverging section lengthL_4＞cylindrical section lengthL_3＞converging angle\alpha ; while for vapor volume fraction: cylindrical section diameterd＞diverging angle\theta ＞diverging section lengthL_4＞converging angle\alpha ＞contraction lengthL_2＞cylindrical section lengthL_3. The cylindrical section diameterd was the dominant parameter affecting cavitation characteristics and exhibited a monotonic variation trend; the cylindrical section lengthL_3 had an optimum value; whereas the contraction lengthL_2, diverging section lengthL_4, and converging angle \alpha showed significant non-monotonic variations, reflecting complex interactions among the parameters.