The invention relates to the technical field of sewage processing, and especially relates to the technical filed of plasma-supersonic wave combined water processing. A plasma-supersonic wave combined water processing apparatus comprises an atomizing nozzle, a dielectric barrier discharge reactor, an ozone collecting tower, a box-type reactor, a high-voltage pulse power supply, an ultrasonic power supply, a data acquisition and control unit, and a power supply unit; the dielectric barrier discharge reactor is connected with the high-voltage pulse power supply; the atomizing nozzle is arranged above the dielectric barrier discharge reactor; the lower end of the dielectric barrier discharge reactor is connected with the ozone collecting tower; an ultraviolet lamp and the box-type reactor are arranged below the ozone collecting tower; the bottom of the box-type reactor is provided with a piezoelectric transducer and an aerating device; the piezoelectric transducer is connected with the ultrasonic power supply; the power supply unit comprises photovoltaic and commercial power combined power supply; and the data acquisition and control unit is used to control other functional units.