Abstract: According to the present operation of centrifugal pumps in China, this paper introduces and analyses the calculation method and process of centrifugal pump impeller cutting, and puts forward the modification plan. The energy saving operation of centrifugal pumps is realized, the purposes of energy saving and consumption reduction are achieved, and the safe and smooth operation of the plant is ensured.

Key words: centrifugal pump, impeller cutting, pipeline characteristics, specific speed, energy saving