The invention relates to a cleaning robot.The cleaning robot comprises a primary robot body and at least one secondary robot body.The primary robot body carries the at least one secondary robot body, and is larger than the secondary robot body in size, and the primary robot body perceives the environment parameters of a target area; whether the primary robot body enters the target area or not is judged according to the environment parameters; if the primary robot body can not enter the target area, a first command is transmitted to the secondary robot body; the secondary robot body receives the first command; when the secondary robot body receives the first command, the secondary robot body is separated from the primary robot body and enters the target area to clean the target area.According to the embodiment in the technical scheme, the target area where the primary can not enter can be cleaned through the secondary robot body carried by the primary robot body; as the secondary robot body is small in size, the secondary robot body can smoothly enter the target area to conveniently complete cleaning work for the target area.