Abstract: ANSYS software was used to analyze steel joint specimens with force-transferring plates without considering the imperfects，whose results were compared with the results of 1 /2 scale test，which verified the correctness of the models． When the vertical deviation was five times as many as the permission of the code，six groups of specimens with different width and thickness of steel beam flanges were designed and the key parameters of the adding plates were adjusted． The analysis of load-displacement curves and stress distribution showed that the thickness of adding plate should be the same as that of the steel beam flange and the width of the plales should be 0. 75 ～ 1. 25 times as that of steel beam flanges．