Through the clinical and basic research during the last 30 years, people have realized the one sidedness of the biomechanical viewpoint of AO resuming the anatomical continuity and mechanical integrity early. The specialists put forward improved measurements in many aspects including reduction procedures, fixation methods and modalities of osteosynthesis. The new concept of fracture treatments with a biological viewpoint BO(Biological Osteosynthesis) has been set up progressively. It stresses on the maintenance of the blood supply of surrounding soft tissues as the most important element in the osteosynthesis. The author suggests that it would be more precise if we take the BO for biological logical osteosynthesis. Certainly, non operative osteosynthesis must be taken seriously too.