The invention discloses an infrared therapy device realizing multi-level height adjustment. The infrared therapy device comprises moving wheels, first cylinders, second cylinders, an infrared therapy device body, primary vertical rods, secondary vertical rods, tertiary vertical rods, cross rods, infrared lamp sets, right-angle-shaped blocks, bolts, nuts, a liquid crystal operation panel, a start key, a reset key and ventilation and heat dissipation holes. The infrared therapy device realizing multi-level height adjustment has the beneficial effects that the telescoping connection among the primary vertical rods, the secondary vertical rods and the tertiary vertical rods can realize the multi-level adjustment for the height of the infrared lamp sets along with the different treatment positions, when the treatment height is insufficient, the suitable height can be achieved through the telescoping adjustment for the first cylinders and the second cylinders, the first cylinders and the second cylinders are connected with the right-angle-shaped blocks through the bolts and the nuts, the right-angle-shaped blocks are connected with the infrared therapy device body through the bolts and threaded holes in the bottom of the infrared therapy device body, and therefore, the infrared therapy device can be conveniently assembled or disassembled when in use or not in use.