Clinically, there are many types of pneumatic compression therapy, some of which are needed for long-term bedridden elderly people with air mattress beds, which can well prevent the emergence of pressure sores on various bone protruding parts of the limbs. In addition, after limb fracture or other parts of the fracture age, or blood tests, the risk of thrombosis is relatively high, for the lower limbs of the limbs of the pneumatic pressure treatment, is conducive to the passive contraction and diastole of the muscles, can prevent the formation of venous thrombosis of the lower limbs. These are relatively auxiliary treatment methods, of course, especially because of the long time bedridden, with air mattress bed treatment in the clinic is very critical, if the emergence of pressure ulcers for the elderly is a fatal blow, the treatment is very troublesome.