The invention discloses a car maintenance positioning platform which comprises a left platform body and a right platform body. The left platform body and the right platform body are of the same structures arranged symmetrically; the left platform body comprises a supporting frame, a moving frame and a supporting platform, the moving frame is arranged on one side of the supporting frame, and the supporting platform is arranged on one side of the moving frame and comprises an upper platform body and a lower platform body; the upper platform body is movably arranged on the upper portion of the moving frame, and the lower platform body is fixed to the bottom of the moving frame; a wheel limiting device is arranged on one side of the lower platform body and comprises positioning rods, the positioning rods are arranged on the lower platform body, telescopic rods are arranged on the positioning rods and arranged on one side of a connecting plate, and a limiting plate is arranged on the otherside of the connecting plate; and sliding blocks I are arranged at the bottoms of the positioning rods, sliding grooves I matched with the sliding blocks I are formed in the lower platform body, hydraulic cylinders are arranged at the side edges of the moving frame, and the telescopic ends of the hydraulic cylinders are connected with the sliding blocks I. According to the car maintenance positioning platform, cars with different sizes can be limited through arrangement of the wheel limiting device, and safety is improved.