finite element method since the 70's in last century applied research aspect in bone,up to the present already very greatly get to develop and Be studying osseous of each one got an extensive application.The author carries on for finite element method basic principle and its characteristics of the method of elaborate,and distinguished to make a synopsis in development and present condition of[with] application of medical biomechanics with fern analysis analytical operation method and consociation operation method to spiral CT 3D reconstruction of introduction.