The utility model relates to a multifunctional horizontal rotating opening type inspection well lid and belongs to the technical field of inspection well lid equipment. According to the technical scheme, the multifunctional horizontal rotating opening type inspection well lid comprises a well lid base (1), I-shaped pins (4), a well lid body (5), a screw pin and a T-shaped anti-theft lock, a T-shaped guide groove (2) is formed in the well lid base (1), the well lid body (5) and the well lid base (1) are connected through the screw pin, the screw pin penetrates through the T-shaped guide groove (2), a rubber gasket (14) is arranged between contact faces of the well lid body (5) and the well lid base (1), the two or more I-shaped pins (4) are arranged on the well lid body (5) in the circumferential direction, and the T-shaped anti-theft lock matched with the T-shaped guide groove in shape is arranged on the T-shaped guide groove. The multifunctional horizontal rotating opening type inspection well lid has the advantages that in the horizontal rotating opening or closing process, three-dimensional space is saved, personal injury accidents caused by accidental closing in the open state are avoided, the well lid can be effectively prevented from rising and making noise when vehicles and pedestrians pass by, and meanwhile the anti-theft purpose is achieved.