本文提出了运用四边形等参壳元构造管节点有限元模型，用自动步长增量法来计算管节点的极限承载力：在ＡＤＩＮＡ程序的基础上开发了前处理和后处理程序，使管节点（包括空间管节点）的有限元分析的成本大大降低；平面管节点的算例表明本文方法与实验结果相吻合，在此基础上本文提出并计算了圆管与矩形管管节点。 In this paper, the finite element model of pipe joints is constructed by using isosceles shell of quadrilateral shape, and the ultimate bearing capacity of pipe joints is calculated by incremental increment method. Pre-processing and post-processing procedures are developed based on ADINA program, (Including the space tube node), the cost of the finite element analysis is greatly reduced. The calculation of the plane tube node shows that the method in this paper is in good agreement with the experimental results. Based on this, the paper proposes and calculates the joint of the tube and the rectangular tube.