The invention discloses a lifting platform for a shared bicycle underground garage. The lifting platform comprises a supporting framework and a lifting disc for driving a shared bicycle to be transferred between the ground and the underground garage; multiple ball screws vertically penetrate through the lifting disc, and are uniformly distributed around the axis of the lifting disc at intervals, the two ends of each ball screw are fixed to the top and the bottom of the supporting framework respectively, a screw nut is screwed on each of the ball screws, multiple motors for driving the screw nuts to rotate are arranged on the lifting disc, and the lifting disc is driven to lift through the cooperation of rollers connected with the screw nuts and grooves of the lifting disc; a connecting rodmechanism which is used for stretching out of the edge of the lifting disc when the lifting disc is aligned with the ground is arranged on the bottom face of the lifting disc and comprises multiple supporting rods which can synchronously stretch out of the edge of the lifting disc, and the supporting framework is provided with a supporting ring which is used for supporting the connecting rod mechanism which stretches out of the edge of the lifting disc. The shared bicycle enters and exits from the underground garage simply and safely, and the requirement of the bicycle for entering and exiting from the underground garage is met.