Anti-blocking type self-sinking well lid

The utility model discloses an anti-blocking type self-sinking well lid, and belongs to the technical field of well lids. The anti-blocking type self-sinking well lid comprises a self-sinking type built-in well lid and a marble cover plate, the marble cover plate is arranged above the self-sinking type built-in well lid, the self-sinking type built-in well lid comprises a main body well frame, and corner seat shafts are arranged on the periphery of the main body well frame. In order to solve the problem that in rainy days, a large number of floaters may be mixed in accumulated water, and once the floaters enter an air pipe along with water flow, the air pipe is blocked, four sets of drainage hole grooves are further formed in the periphery of the self-sinking type internally-buried well lid, and the drainage hole grooves are communicated with a water collecting well groove through drainage runners. In rainy days, accumulated water on the road surface can flow into the water collecting well groove through the