Biological control is one of the research hotspots in plant disease management.As an important plant growth promoting bacteria (PGPR) in rhizosphere,Pseudomonas plays important roles in inhibiting pathogens and promoting plant growth.This review summarized the isolation and identification methods of Pseudomonas,its biocontrol mechanisms,the application status of potassium and phosphorus solubilizing strains,and the allelopathy of phenolic acids on Pseudomonas.Pseudomonas could improve plant disease resistance by producing antibiotics,hydrolases and inducing systemic resistance.It could also promote the absorption and utilization of insoluble iron,potassium and phosphorus in the environment by host plants,through producing siderophores,potassium and phosphorus solubilizing bacteria.This would have great application value in agricultural production.Important research directions in the future include using biotechnology to screen and cultivate high-efficiency Pseudomonas strains;optimizing its biological and chemical technology;and undertaking theoretical research on the interaction between Pseudomonas strains and soil pathogenic microorganisms,and plant root exudates by using high-throughput sequencing technology and other advanced technology.