A lifting desk includes a desk top, a support frame and a base. The support frame has an inner pipe with a top end, a bottom end, and an outer pipe. The inner pipe is movably inserted into the outer pipe, the top end of the inner pipe pivotally joining the desk top, the bottom end of the outer pipe pivotally joining the base; a connecting bar and a drawing bar, one end of the connecting bar pivotally joining the center position of the inner pipe, the other end slidably connected to the bottom surface of the desk top, one end of the drawing bar pivotally joining the base, the other end of the drawing bar slidably connected to the outer pipe. The desk top, the inner pipe and the connecting bar form a link mechanism. The outer pipe, the base and the drawing bar form a second link mechanism.