Abstract: A self-moving cleaning robot comprises a body and a water tank. The water tank includes a tank body having an air duct and a fan accommodation cavity extending from the bottom of the tank body toward the top of the tank body. An opening end of the fan accommodation cavity faces downwards of the tank body. An air inlet is provided on a side wall of the tank body, and an air outlet is provided at the top of the fan accommodation cavity. The air duct is formed in an inner cavity of the tank body, comprising a second channel formed by side walls of the fan accommodation cavity and corresponding portions of side walls of the tank body, and a first channel located in the inner cavity of the tank body between the air inlet and the fan accommodation cavity.