In order to meet the need for the Xin Jiang coal-gas transmission pipeline engi-neering on welding quality and efficiency,the paper analyzed the applicability of several auto-matic welding processes. Taking the process, equipment and construction process into con-sideration, it is recommended to use the automatic welding equipments with whole process. Comparing the foreign technology of automatic welding system of CRC-EVANS and SERI-MAX (DASA) with the independent research and development of CPP900 in our country. We can draw a conclusion that the technology of CRC-EVANS units is relatively mature. The Saturnax 05 units of SERIMAX required less number of workstations, purchase cost of the unit is relatively low. The manufacturers of CPP900 units System provide free training and technical support, maintenance of equipment is more convenient.%为满足新疆煤制气外输管道工程对焊接质量的需求，初步分析了几种自动焊接工艺组合的适用性，综合考虑工艺、设备、施工工序三方面因素，推荐使用全位置的自动焊接工艺。将国外两个全位置自动焊系统CRC-EVANS和SERIMAX （DASA）与我国某研究院自主研发的CPP900系列自动焊系统进行对比研究表明：CRC-EVANS机组技术较为成熟；SERIMAX的SATURNAX05机组所需配置工作站数量少，机组的购置费用相对较低；CPP900系统生产厂家免费提供人员培训和技术支持，后期设备维护较为方便。
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