Abstract: Zilanba hydropower Station unit has been in operation for 14 years. The water deflection of the turbine is designed and manufactured by foreign companies, and the defect rate of the distributor increases year by year.As the spare parts of the water guide mechanism are imported, the procurement cycle is long and the structure size and technical parameters cannot meet the original design requirements. As a result, the power station cannot normally purchase the spare parts of the distributor at present, which has seriously affected the normal power production of Zilanba Company.In view of the procurement and technical risks of the existing distributor spare parts of Zilanba hydropower station, which all rely on imports, Zilanba Company and Dongfang Electric Machine Co., LTD carried out a study on the replacement design of the distributor spare parts made in China. Through a comprehensive analysis, comparison and research on the structure, material, performance and assembly of the original distributor parts and the replacement design made in China, The objective of autonomous and controllable procurement of water guide mechanism spare parts of Zilanba hydropower station and excellent technology have been achieved, which will provide references for domestic substitution research and application of imported parts of similar power stations.