The invention provides a well lid detection robot. The well lid detection robot comprises a detection module, a swing arm and a walking mechanism. The well lid detection robot is characterized in that the swing arm is fixedly installed on the upper end face of a large gear on the walking mechanism through a base at one end; the upper end face of a detection platform of the detection module is fixedly installed on an installing base at the other end of the swing arm; and the well lid losing situation is found in time by detecting the wheel pressure value changes, the well lid detection work is efficiently and accurately finished, the checking efficiency is improved, and the risk of going out in rainy days is reduced.