Abstract: The article describes the key technology that finite-element analysis is integrated in welding technology expert system based on artificial intelligence.In C++Builder developing environment,through client program calling software-component,multi-thread technology and model scanning,finite-element analysis software ABAQUS may be a part of welding technology expert system.The automatic conversion from Welding Procedure Specification to boundary conditions of finite element analysis can be achieved.Finite element analysis software offering basis data as middle-deduce-reasoning to expert system decision-making may be realized.