In order to enrich the diversity of low and medium cadmium resources in Brassica resources in China， 79 Brassica resources introduced from Japan were treated with high（30 mg/L）and medium（10 mg/L）cadmium stress at seedling stage，so as to carry out the research on cadmium tolerance and accumulation characteristics of Brassica resources. Compared with the traditional method of cultivating soil polluted by cadmium，it has the advantages of time-saving，labor-saving and stability High quality. The results showed that 79 resources had rich variation in cadmium tolerance. Three stable and three cadmium sensitive materials were selected under high（30 mg/L）and medium（10 mg/L）cadmium stress. The analysis of Cd accumulation characteristics showed that the CD content of stable CD tolerant material was significantly lower than that of CD sensitive material，and that of d069 was significantly lower than that of other materials，and the migration coefficient of D125 was relatively low，which had high breeding value. In this study，d069 and D125，two gene pools of cadmium tolerance and low accumulation resources，rich in domestic Brassica resources and low accumulation of cadmium，will greatly promote the breeding process of new varieties of Brassica pollution safety，and effectively promote the safe utilization efficiency of cadmium polluted farmland.