The salt tolerance of mung bean at germination stage is an important index for its utilization in saline-alkali soil. Identification of germplasm with high salt tolerance at germination stage can improve the utilization rate of salinization land. In the present study, based the pre-experiment, we selected 1.2% NaCl as the best solution for identification of 769 mung bean accessions at their germination stage, by measuring germination rate(GR), germination potential(GP), germination index(GI), relative salt damage rate and other indexes through hydroponic experiments. The results showed that the average germination rate of mung bean germplasm under 1.2% NaCl salt stress was 52.9%. Among different regions, the average germination rate of resouces from East Asia is the highest (66.5%), while it is the highest from Northeast China (57.4%). The degree of variation in germination potential is the highest among all indexes under salt stress (CV: 58.0%), particularly the germplasm from the North China region, its coefficient of variation reached 63.2%. In terms of seed coat traits, the salt tolerance of brown-grained germplasm was notably weaker than that of other colored seeds, while the germplasm with luster seed coat had significantly greater tolerance than the dull-surfaced resources. The analysis revealed a significant correlation between the 100-seed weight and their salt tolerance, with germplasm weighing less than 3 g showing a marked decrease in salt tolerance. This study offer data support for the selection of salt-tolerant germplasm and variety breeding in mung bean.