Supporting device with anti-seepage and heat preservation functions for arm

The utility model relates to the technical field of medical protectors, and discloses an arm supporting device with anti-seepage and heat preservation functions, which comprises a forearm sheath, an arm sleeve is sewed on the right side of the forearm sheath, and a rubber sleeve ring is adhered on the left side of the forearm sheath. The left end and the right end of the forearm protective sleeve and the upper end and the lower end of the arm sleeve are fixedly sleeved with guide rail rings, and clamping blocks are movably sleeved with the guide rail rings. After the gauze is wrapped and the shoulder straps are sleeved on the shoulders, free movement of arms is realized on the premise of guaranteeing air permeability, liquid medicine is prevented from leaking when the arms move and polluting clothes or a bed sheet through tightening and fixing of the rubber sleeve rings and the tightening straps, the heat preservation bag can be mounted or dismounted according to use requirements, and the heat preservation ba