Direct-seeding resistance in the field is a complex quantitative trait. Accurate phenotypic identification is critical to discover the genes and explore genetic basis for quantitative trait. The method of phenotypic identification of rice germplasm resources for direct seeding tolerance under field conditions has always been a technical problem of concern rice breeders. This paper addresses this issue， and on the basis of many years of field identification and research on the tolerance of rice germplasm resources to direct， it explores and optimizes the field identification system for direct seeding tolerance. The standard technical regulations for evaluating direct-seeding resistance in the field were summarized and normalized. It included general requirements， land preparation before sowing， seed preparation， sowing， fertilization，water management， prevention of diseases， pests and weeds， and evaluation of direct-seeding resistance in the field at seedling stage. The regulations provided technical reference for identification of direct-seeding resistance in the field at seedling stage in rice or other crops. It was suitable for the resistance evaluation of rice to direct-seeding during the spring in northwest region （from mid-March tolate June）.