Project Introduction: Cavitation has a significant impact on fluid machinery such as water pumps, including reducing work efficiency, generating vibration and noise. This project introduces cavitation and noise models to study the evolutionary characteristics of the process from cavitation inception, development to collapse, and its impact mechanism on flow noise, thereby conducting low-noise optimization design for water pumps. Innovation: Innovation points include the characteristics of the process from cavitation inception, development to collapse; the impact mechanism of water pump cavitation on flow noise; and conducting low-noise design, which is conducive to its promotion and application. Prospects: This project can effectively reduce the cavitation and operating noise of water pumps, effectively solve the limiting defects of such equipment, significantly enhance the market competitiveness of water pumps, and has good application prospects and social and economic benefits.