Abstract: Automatic welding technology is widely used in the large-diameter and high-grade steel pipeline projects, but no mature automatic welding technology system is available at present. According to the construction characteristics of automatic welding, with reference to practical experience in automatic welding of long-distance pipelines, key points of technical preparation for automatic welding were put forward in terms of design, pipe, welding, nondestructive testing and construction organization, focusing on improving construction efficiency and ensuring the construction quality. In addition, the current situation of personnel, technical reserve and informatized welding quality management was analyzed, and the reasonable measures were proposed to provide references for the follow-up promotion of automatic welding technology in pipeline projects, improve the welding efficiency and take full advantages of the technology.