The cDNA sequence of StSnRK2.4 were cloned by RT-PCR from the test-tube seedling roots of common potato cultivars ‘Longshu-3’.The full sequence contained 1 083 bp and encoded 360 ami-no acids,and there were high homologies with the SnRK2 gene family of tobacco,and the homology was 95.56%.The gene was registered to GenBank (No.JX280914).The bioinformatics analysis showed that the molecular weight of SnRK2.4 was 41.49 kU,the theoretical isoelectric point was 5.52,and it had not trans-membrane domain and mainly existed in the cell nucleus containing some active sites,such as cAMP-and cGMP-dependent protein kinase phosphorylation site,Protein kinase C phosphorylation site,Casein ki-nase II phosphorylation site,Tyrosine kinase phosphorylation site and N-myristoylation site,Serine/Threo-nine protein kinases active-site and protein kinases ATP-binding region.It is suggested that the function of the gene can associate with plant resistance to adversity stress.