A can hanging type garbage truck comprises a frame and a carriage arranged on the frame. A feeding area is arranged on the front side of the carriage. A feeding opening is formed in the top surface of the feeding area. An automatic feeding mechanism is arranged on the side surface of the carriage and is corresponding to the feeding opening, and comprises a can hanging component and a can turning component. The can hanging component comprises a hanging frame, a telescopic connecting rod connected with the hanging frame, and a telescopic cylinder for driving the telescopic connecting rod to move on a horizontal surface. Hooks are arranged on the hanging frame to hook garbage cans. The can turning component comprises a sliding frame, pull rods, slide rails and lifting cylinders. The telescopic connecting rod and the telescopic cylinder are hinged to the sliding frame. One end of each pull rod is hinged to the sliding frame, and other end of each pull rod is connected with the lifting cylinder. The lifting cylinders drive the pull rods, and drive the sliding frame, the can hanging component and the garbage cans to move up and down along the slide rails. The garbage cans are lifted to a roof for dumping garbage, the whole process is full-automatic, workers are not needed to get off the garbage truck to operate, manpower requirements are reduced, and the efficiency is improved.