The invention discloses an environment-friendly garbage smashing device, and relates to the technical field of environmental technology. The problem that an existing device is not thorough in smashing is solved. The device comprises a device main body, a hydraulic cylinder, a first filter plate, a storage box body, a feeding conveying belt and a second motor; a feeding box is arranged on the right side of the top of the device main body, the upper end of the right side of the feeding box is connected with a driving wheel through a sliding plate, the driving wheel is arranged on a first motor, the driving wheel is connected with a driven wheel through a feeding conveying belt, the second motor is arranged in the feeding box, the rear end of the second motor is fixedly connected with the inner surface of the rear wall of the device main body, a bearing plate is arranged in the device main body, the garbage can be effectively smashed, the smashing effect is good, triple smashing is achieved, the problem that garbage needs to be lifted to the high position to be put into a garbage box, and fatigue is generated is avoided, and the device is suitable for popularization.