Abstract:With 200 maize elite inbred lines in Jilin Province as test materials, the experiments were carried out at seed germination and three-leaf stage, respectively. 200 mmol/L NaCl, 100 mmol/L Na2CO3, 200 mmol/L NaCl + 25 mmol/L Na2CO3 mixed solutions suitable for the screening of saline, alkaline and mixed saline-alkaline screening were used for stress test. Seed germination rate, seedling condition and other physiological indexes suitable for salt and alkali tolerance screening were measured, and then transformed into tolerance coefficient to comprehensively evaluate the salt and alkali tolerance of inbred lines. The results showed that there were significant differences for saline-alkaline tolerance among maize inbred lines in different stages and different treatments. Combined with the results at the bug and seedling stages, 200 inbred lines were divided into 5 groups(high tolerance, tolerance, moderate tolerance, sensitivity and high sensitivity). Eight inbred lines(444, Si 287, Zhe 446, A188, Ye 52106, Ji 741, Jit 9, Ji 728) with high saline-alkaline tolerance were selected. The results provided experimental basis for the selection of maize saline-alkaline resistant germplasm resources.