The invention discloses a well lid capable of adjusting the backflow amount through pressure. The well lid comprises a well seat and a well lid body. The well lid body is provided with multiple counter-bored holes internally provided with threaded rods and the lower ends of the threaded rods are connected with threads of the well seat in a matched manner. Springs are arranged between the threaded rods and the bottom faces of the counter-bored holes and the threaded rods are sleeved with the springs. A through hole is formed in the middle of the well lid body, a rotary rod is arranged in the through hole, a rotary disc is arranged at the upper end of the rotary rod, the lower end of the rotary rod penetrates the well lid body and is provided with multiple rotary blades, and the upper ends of the rotary blades make contact with the well lid body in a matched manner. By the adoption of the well lid, pedestrians are effectively prevented from falling into a well.