Abstract: A software package has been developed which can simulate and predict the weld solidification cracks with three dimensional FEM.It consists of pre-processing,post-processing and solidification cracks predicting subsystem.The post-data treatment of software package for three-dimensional simulation and prediction of the weld solidification cracks can deal with the calculated results and display the results in featured curves,contours and 3D figures by combining graphic functions of softwares.The solidification cracks predicting subsystem regresses to the experimental data of trans-varestraint test(TVT) to obtain the material resistance curve of weld solidification cracks or reads the modified material resistance of simulating TVT from the database and has it compared with the one and thus predict the weld metal solidification cracks.