Waste battery decomposition device

The utility model belongs to the technical field of battery recovery and disassembly, and particularly relates to a waste battery decomposition device which comprises a decomposition assembly and a filtering assembly, the decomposition assembly comprises a decomposition assembly shell, a feeding port guide plate, a plurality of decomposition wheels, a discharging port guide plate and a conveying belt, and the filtering assembly comprises an air inlet, an exhaust fan, a filter element, a filter cylinder, an air pipe and an air outlet. The filter assembly is fixedly connected to the top of the side face of the decomposition assembly shell, the air inlet is formed in the decomposition assembly, the air pipe, the filter element, the filter cartridge and the exhaust fan are arranged in the filter assembly, and the air inlet, the exhaust fan, the filter cartridge and the air outlet are sequentially connected through the air pipe. The exhaust fan can suck poisonous and harmful gas generated when the waste battery is