Abstract: Based on the local properties of singular field, the displacement pattern of isoparametric element is improved and a new formulated method of quasi-compatible finite element is proposed in this paper. This method can be used to solve various engineering problems containing singular distribution, especially, the singular field existing at the tip of cracks. The singu-lar quasi-compatible element (SQCE) is constructed. The characteristics of the element arc analyzed from various angles and many calculation ex...