Humerus fracture one month in the primitive bone scab formation period, primitive bone scab formation or bone endothelial and periosteal osteoclast proliferation, in the fracture end of the internal and external formation of bone tissue gradual ossification, the two ends of the bone scab in the gradual convergence. Humerus fracture healing is divided into 3 stages, hematoma mechanization period is completed in about 2 to 3 weeks after the fracture, one month after the fracture is in the period of primitive bone scab formation, the bone tissue formed inside and outside of the fracture end is gradually ossified and new bone is formed, the fibrous tissue in the fracture end and the medullary cavity is gradually transformed into cartilage tissue, and the two parts of the bone scabs are gradually converging, and it will take about 3 months for the adults to complete it. During this period, braking of the broken bone should continue to be ensured to prevent secondary fracture due to movement or deviation in reset. On the premise of not affecting the fixation, active functional exercises should be performed to prevent complications such as muscle atrophy.