To evaluate and classify the salt-alkali tolerance of 79 Chinese kale samples during the germination period, this experiment examined the germination potential, germination rate, germination index, and germination rate of Chinese kale seeds under the following treatments: ultrapure water (CK, pH 6.5), NaCl (S, Na+ 240 mmol?L_^?1, pH 6.5), and “NaCl+Na?CO?” (SA, Na? 240 mmol?L_^?1, pH 9.0) were analyzed using principal component analysis, membership function analysis, the comprehensive salt and alkali tolerance index D value, and cluster analysis. The results showed: (1) Compared with CK, salt and salt-alkali stress inhibited all germination indicators, with root length showing the greatest inhibition, decreasing by 92.08% and 91.49%, respectively, and the coefficient of variation increasing by 5.36-fold and 6.36-fold; (2) Compared with CK, the proportions of varieties showing significant increases and decreases in different germination indicators varied. Among them, the proportions of varieties showing significant increases and decreases in germination vigor were 44.30% and 24.05%, respectively, while those showing significant increases and decreases in root length were 11.39% and 5.06%, respectively; (3) Based on the cluster analysis of the comprehensive salt and alkali tolerance index D value, Chinese kale materials were classified into five categories: highly salt (alkali) sensitive type, moderately salt (alkali) sensitive type, salt (alkali) tolerant type, moderately salt (alkali) tolerant type, and highly salt (alkali) tolerant type, with the number of varieties in sequence is 19 (14), 13 (12), 21 (27), 19 (17), and 7 (9); (4) Through Venn diagram analysis of extreme-type materials, 12 highly double salt-salt-alkali sensitive type and 6 highly double salt-salt-alkali tolerant type were screened; (5) A comparison of eight relative indicators between four randomly selected highly double salt-salt-alkali sensitive type and four highly double salt-salt-alkali tolerant type materials showed that, except for relative shoot fresh weight and relative root length, the six relative indicators of germination vigor and germination rate of the highly double salt-salt-alkali tolerant type were significantly or extremely significantly higher than those of the highly double salt-salt-alkali sensitive type. The results of this study provide an important resource foundation for the breeding of salt-alkali tolerant Chinese kale varieties and the identification of key stress-resistant genes.