The present invention discloses a swimming pool cleaning robot comprising a bottom shell, a sealed tank and a first counterweight block, the sealed tank is provided inside the bottom shell, and the first counterweight block is provided inside the sealed tank. The first counterweight block is provided in a sealed tank of a swimming pool cleaning robot without additionally providing an installation space for the first counterweight block, making full use of more difficult to use inside the swimming pool cleaning robot, and effectively reducing the space required inside the swimming pool cleaning robot while ensuring that the counterweight block meets the requirements, thereby reducing the volume of the whole machine. Besides, it does not require flattening of the bottom shell of the swimming pool cleaning robot, so that the bottom shell can be designed in a variety of shapes to enrich the diversity of the swimming pool cleaning robot.