The invention discloses an acoustic flow coupled cavitation enhanced water treatment device, comprising a hydraulic cavitator, an ultrasonic cavitator, a reaction tank, a water inlet elbow, a shaft, a shaft seal, a bearing, an end cover, a shaft coupling, a frequency conversion Motor, sewage circulation pipeline, clean water discharge pipeline, solenoid valve, sewage pump, multi-parameter water quality detector, water level sensor, intelligent control system. Solenoid valves, sewage pumps, and multi-parameter water quality detectors are installed on the sewage circulation pipeline; the sewage circulation pipeline forms a circulation loop with the water inlet elbow, cavitator, reaction tank and water level sensor, and the clean water discharge pipe and the sewage circulation pipeline Connection; Solenoid valve, water level sensor and variable frequency motor are connected with intelligent control system. The present invention organically combines a hydraulic cavitator, an ultrasonic cavitator, an intelligent control system, etc., and has the advantages of excellent sewage treatment effect, high automation level, low energy consumption during the action process, simple process, etc., and can carry out large-scale sewage treatment, Improve the utilization rate of water resources.