With the increasing requirements of train running speed and carrying capacity,more stringent requirements have been put on the material and performance of the bogie welding framework.On the basis of MAG welding process,the welding technology research of bogie frame is already quite extensive and thorough.At present,although the bogie wire can meet the requirements for welding use,but there are large spatter,welding pores,welding slag and undercut etc.other defects in the process of welding,and the transient stability of small current need to be improved.There is an urgent need for new welding materials of cold-resistant and high toughness,which have excellent use of operational performance,long life,high reliability,and a wide range of environmental service consumables.In the future,new materials and new technology will be the hot spots and focuses for a long time.Light weight,environment friendliness,high reliability,long life and laser welding technology will lead to faster and better development of bogie welding manufacturing technology in the future.