The invention discloses an F-type lead rail fine-adjusting frame for a medium and low speed maglev track. The F-type lead rail fine-adjusting frame comprises a frame body, a prism mounted on the frame body, a jamming device for jamming the frame body and a measured F-type lead rail, and a locking device for locking the frame body and the measured F-type lead rail. The frame body comprises a main board, a vertical board fixedly mounted at one side of the main board, and a prism mounting rack mounted on the top end of the vertical board for mounting of the prism. The locking device comprises a permanent magnetic chuck mounted on the main body and a clamping mechanism for fastening the permanent magnetic chuck onto the main board. A magnetic surface of the permanent magnetic chuck acts on a lower sensor board standard surface of the measured F-type lead rail. The F-type lead rail fine-adjusting frame for a medium and low speed maglev track can achieve the purpose of leading the lower sensor board standard surface to an upper sensor board standard surface, thereby solving the problem that the accuracy of the lower sensor board standard surface of the measured F-type lead rail cannot be measured directly, and is applicable to fine adjustment operation for the medium and low speed maglev track and convenient for adjusting the altitude and mileage of a medium and low speed maglev track skeleton and the center line of the track skeleton.