Abstract: The present application discloses an underwater cleaning robot, which includes a chassis provided with a plurality of driving wheels. The chassis includes a primary suction port and a pump assembly. The primary suction port is provided with a channel which passes through the chassis. The chassis is connected to the filtering assembly. The filtering assembly includes a secondary pump port and a secondary suction port. The pump includes a primary pump port which is connected to the pump impeller. The secondary pump port is connected to the primary pump port. The secondary suction port is connected to the primary suction port. When assembling, the secondary suction port on the filtering assembly is in line with the primary suction port, and the secondary pump port is connected to the primary pump port. Finally, the filtering assembly is snapped into the chassis.