Chondralization of bone is a way of bone formation, often after the fracture occurs, the phenomenon of chondralization of bone occurs, after the fracture occurs, bleeding in the bone marrow cavity, the local hematoma mechanization, these hematomas gradually form cartilage, from the cartilage and then calcification to form bone, gradually harden, just like normal bone, so called bone scab. Chondralization of bone is an important way of fracture repair and healing, through the function of chondralization of bone can make the fracture connection to achieve the purpose of re-healing. Therefore, understanding chondralization of bone is very helpful in understanding the process of bone repair, bone scab formation, and fracture healing.