This paper present a new method to interpolate high order curve which is used in CNC system,at the time use this method is samed to interpolate a three order curve,the result prove that this method is high efficient and precise.

Taking Euler Elastic Theory as the base, the article applies the space finite element process to carry out the stabilization analysis of T-frame of the high-pier curve continuous rigid frame bridge under the construction of the largest cantilever.