Abstract: The scaling method of the loss degree of joint motion is very common in clinical forensic medicine.However,there is no uniform criterion until now.Therefore,this had made a negative effect to ensure the impartiality and justice in law and the identification.The advantages and disadvantages of the four methods recorded in literatures by practical case,which include major and minor methods,additional methods,directive average methods,axial directive average methods,were discussed and compared.Now three basic critics about how to choosing the applicable technique in forensic medicine were supposed according to the impartiality and justice principle,scientific and objective principle,simple and easy principle.It was hoped that we can reach a consensus in our legal-medical circumscription that all of us can choose the Axial Directive Average Methods as our standard for the loss degree of joint motion,to avoid the disadvantages of this aspect.

Key words: forensic clinical medicine, degree of motion of joints, scaling method