Ultrasonic physiotherapy is mostly used for the treatment of soft tissue injuries and chronic pain patients, can play the role of anti-inflammatory, pain relief, promote injury recovery, regulate the body mechanism, improve microcirculation, especially for the elderly body injury has a relatively obvious therapeutic effect, specific efficacy is as follows: 1, anti-inflammatory, pain relief: ultrasonic physiotherapy can eliminate inflammation in the body, with anti-inflammatory, pain relief effect, for acute sprains also have Alleviate the role of frozen shoulder, lumbar strain has an improving effect, but also to relieve the pain of bruises; 2, promote injury recovery: ultrasound has a strong penetrating force, can improve local blood circulation to promote cell repair, for the generation of cells, growth has a role; 3, regulate the human mechanism: the human nervous system is sensitive to ultrasound, ultrasound physical therapy can affect the body’s nerve reflexes and humoral response The body mechanism has a regulatory role, because the energy direction of ultrasound is more concentrated, so the treatment of injury to the elderly is better; 4, improve microcirculation: in the rehabilitation process, ultrasound physiotherapy can stimulate the release of chemokines from mast cells, promote the aggregation of phagocytes in the lesion, remove vascular waste, improve the body’s microcirculation and blood supply to the lesion.