To establish a practical compensation model for medical accident,the total sum allowed must firstly be prescribed.The sum may be calculted similar to but smaller than that paid for traffic ac- cident.Not all victims of medical accident are entitled to receive the prescribed sum.The sum actually of- fered is determined by three factors.①the weight of the causes (the intensity of the fault);②the de- gree of working capacity loss brought about by the aftereffect of an accident;③the factor of age.As the grades of these three factors are respectively assessed,the compensation aum may be worked out.