As a new type of pipe,bimetal composite pipe not only ensures corrosion resistance,but also reduces the cost,which has been widely used in oil and gas mining. The welding of bimetal composite pipe requires that the weld has the corrosion resistance of the clad metal and the mechanical properties of the base metal. Automatic welding can improve the welding efficiency and ensure the quality of welding. Therefore,more and more automatic welding technology is applied in the construction of bimetal composite pipe.The paper introduces the application of bimetal composite pipe,the development of welding technology,and the structure characte-ristics of bimetallic composite pipe and the existing problems in welding,introduces the advanced automatic welding technology. Look forward the prospects of development of automatic welding technology of bimetal composite pipe,and provide a reference for automatic welding of double metal composite tube in our country.