In order to control the welding distortion of the bracket, simplify the experiment process of the welding rod arc welding, improve the manufacturing quality and the performance of the bracket, reduce the destructive accidents that caused by the welding, we applied the simufact welding software into the welding simulation of rape sower bracket, to analyze the temperature, distortion, stress of the bracket suffered in the welding process. The simulation results showed that the temperature of the sample points of the welding seam fluctuated at 1480℃ during the welding process, and if the heating temperature was too high, which would produce coarse crystal grains, cause embrittlement of crystal grains, and easy to form great welding stress and large welding distortion, therefore, if the energy input was reasonably controlled during the welding process, additional rigid rod would be added to reduce distortion of the left and right drawbar in the actual welding process. Through the theoretical t_8/5 time value and the actual welding deformation experiment of the bracket, the simulation results were verified to be consistent with the actual value.