The present paper aims to explain the reason why centrifugal pump produces cavitation and produce cavitation hazards;It is necessary to make a comprehensive exposition of the changes in pipeline design,installation height of the centrifugal pump,and change the structure of the pump itself to improve the device cavitation the margin NPSHa and the lower pump cavitation margin NPSHr to improve the cavitation performance of a centrifugal pump;It gives the introduction of new materials,new technologies to enhance the protection of the centrifugal pump,and reduce the cavitation phenomenon to damage the centrifugal pump.