In DunHuang city of annual rainfall less than 40 mm, 56 Broomcorn millet bred cultivars from different regions in China and repeated drought method were chosen as experiment material and identification method at seeding stage. The study made use of survival rate after repeated drought and comprehensive evaluation valve D as drought evaluation methods, as well as applied cluster analysis and principal component analysis, correlation analysis as classification and the drought resistance index screening methods. Results show: 10 traits were occurred difference among 56 Broomcorn millet bred cultivars. Seedling plant height, plant water content, leaf area per plant, biomass have the greatest effect on repeated drought stress at broomcorn millet seedling, on the contrary, root length, relative growth rate have lesser affect. Longmi No.5, Mengjingmi No.1, Mengjingmi No.7, Ji No.3 were screened grade 1 drought-resistant varieties. Plant water content, biomass, leaf area per plant, relative growth rate can be used as dominating drought resistance identification of broomcorn millet seedling, and root number, root length, root-shoot ratio can be used as auxiliary indexes in drought-resistant identification of broomcorn millet seedling.