This article discusses the current status of welding accuracy of automotive instrument panel cross beam,and combines practical project development experience to summarize the forward development process and key points for improving the welding accuracy of cross beam,from the aspects of cross beam welding clamp design,welding deformation simulation analysis,process validation and consolidation.The results show that through the control of forward development process,the welding accuracy of key points of the cross beam has been improved from the traditional±1.5mm to± 0.5mm,verifying the effectiveness of the process and method,and providing good guidance for the development of the instrument panel cross beam of subsequent automobile project.