Liftable medical bed

The invention discloses a liftable medical bed. The liftable medical bed comprises an underframe, an upper frame, shear-fork type lifting devices and a driving device, the left and right sides of theunderframe and upper frame are respectively provided with first sliding rails, a second sliding rail is arranged between the two first sliding rails of the upper frame; the shear-fork type lifting devices are arranged between the underframe and the upper frame, and the two shear-fork type lifting devices are respectively arranged on the left and right sides of the underframe and the upper frame; the driving device comprises a support seat, a lead screw, a handle and two lead screw nuTS; the support seat is fixed on the upper frame, the two lead screw nuTS are arranged on the second sliding rail and slide along the second sliding rail, and the two lead screw nuTS are connected with the shear-fork type lifting devices at the left and right sides; the left side of the lead screw is provided with a left rotating threa