Abstract: Rice is affected by various biotic and abiotic stresses during development,such as soil salinization and drought as well,which result in massive reduction in rice production.In order to promote the plant growth under saline-alkali stress,6plant growth-promoting rhizobacteria（PGPR）were isolated from the rhizosphere soil of plants grown in saline-alkali land in Anda area in Heilongjiang Province,and their growth-promoting effects were preliminarily studied.The results showed that the six isolated PGPRs could significantly promote the growth of Arabidopsis,rice and maize under saline-alkali conditions,and the biomass was improved remarkably.All of the PGPRs belong to Bacillus,with good stress tolerance.They have different secretions indicating that their growth-promoting mechanisms are different.