Abstract: In this paper, some regulations on the field joint coatings technology of pipeline outer anti-corrosion layer in GB/T 51241-2017 standard and ISO 21809-3:2016 standard are compaired and analyzed, such as the classification and material of the field joint coatings, the construction and performance index of the field joint coatings. Compared with the national standard GB/T 51241-2017, more detailed classification for the types of field joint coatings were listed in ISO 21809-3:2016 standard. The design temperature is relatively more meticulous for the heat-shrinkable materials in ISO 21809-3:2016, but the thickness of heat-shrinkable materials and the performance requirements of raw materials are more specific in GB/T 51241-2017. The requirements about surface treatment for heat-shrinkable materials are basically same in the two standards. In terms of the construction environment and the amount of overlap of heat-shrinkable materials on the pipeline, the requirements are more stricter in GB/T 51241-2017. ISO 21809-3:2016 adds performance indicators such as indentation resistance and lap shear strength to the performance indexes of anti-corrosive coating of heat shrinkable materials. The requirements of cathodic disbondment resistance indicators of heat shrinkable material are basically the same in two standards.