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Lipid metabolism plays an important role in plant response to abiotic stress. Four salt/alkali-tolerant phosphate-solubilizing bacteria strains (W5, Y7, Y14 and Y31, with Latin names of Bacillus siamensis, Pseudo-monas sp., B. wiedmannii and Acinetobacter sp., respectively) screened in the previous study were used for soybean pot experiment to investigate the effects of phosphate-solubilizing bacteria (PSB) on the growth of soybean plants under salt/alkali conditions, and to analyze the changes of lipid compounds in soybean leaves. The results showed that the chlorophyll content, plant height, root length, shoot fresh weight, shoot dry weight, root fresh weight and root dry weight of soybean were increased after treatment with the four strains, and the Y7 strain treatment group had the best effect. The Y7 strain treatment group was selected for soybean leaf lipid metabolism analysis. It showed that a total of 429 lipids were detected, and 30 significantly different metabolites (16 up-regulated and 14 down-regulated) were screened in the Y7 strain treatment group. The metabolic pathways with the largest enrichment of differential metabolic pathways were glyceride metabolism from lipid metabolism, in which the content of diglyceride (DG) was significantly increased, the content of triglyceride ( TG) was significantly decreased, and the total content of phosphatidylethanolamine (PE), phosphatidylcholine (PC) and phosphatidylserine ( PS) was significantly increased, and the total content of phosphatidic acid (PA) and phosphatidylinositol (PI) total compounds was significantly decreased. The comprehensive results showed that salt/alkali-tolerant phosphate-solubilizing bacteria applied to salt/alkali soil had obvious growth promotion effect on soybean and affected soybean leaf lipid metabolic pathways and products. [ABSTRACT FROM AUTHOR]