The utility model discloses a gas-water ultrasonic separation device, and relates to the technical field of coal chemical industry. The device comprises an ultrasonic container, a water inlet and a water outlet are formed in the ultrasonic container, an ultrasonic generator is installed on the ultrasonic container, a spiral rack is arranged at the bottom in the ultrasonic container, a plurality ofadsorption nets are arranged on a rotary rack, and the rotary rack is connected with a motor arranged on the outer wall of the ultrasonic container; a heating element is arranged in the ultrasonic container; according to the utility model, the gas water tar recovery efficiency is improved, the gas water treatment time is greatly shortened, the operation process is simple, and meanwhile, the energy consumption is reduced; the device can be applied to the related production fields of the coal chemical industry, and can also be applied to the fields of volatile substance recovery and the like.