The utility model provides a rotary lifting mechanism of a liquid crystal display screen of a show car, and belongs to the technical field of show cars. The show car comprises a frame chassis crossbeam and a carriage body. The rotary lifting mechanism of the liquid crystal display screen of the show car comprises a fixed box rotating device, a fixed box, a display screen rack lifting device, a display screen fixed rack, a display screen moving rack and a pair of display screen moving rack turnover folding devices, wherein the fixed box rotating device is arranged on the frame chassis crossbeam; the fixed box is connected with the fixed box rotating device; the display screen rack lifting device is matched with the fixed box; the display screen fixed rack corresponds to one side of the display screen rack lifting mechanism; the display screen moving rack corresponds to the other side of the display screen rack lifting mechanism; the pair of display screen moving rack turnover folding devices is arranged on one side, which faces the display screen moving rack, of the display screen fixed rack; and the display screen rack lifting mechanism has a sleeve type nested structure. Directional limitation on the liquid crystal display screen at different angels can be avoided in a display process; a display watching effect is improved; the structure is simplified; and a display screen rack has a double-breadth structure when used, so that the requirement on large-screen displaying can be met.