In order to verify the application effects of probiotics on fast-growing leafy vegetables in summer,taking Xiasheng No.1 as the experimental material,five different treatments were set up to determine the botanical traits and yield of fast-growing leafy vegetables.The results showed that in the case of increasing probiotics,reducing the amount of ternary compound fertilizer by 30%,the botanical traits of fast-growing leafy vegetables performed well,and the effects of reducing fertilizer,saving cost and increasing efficiency was the best.It was indicated that the application of probiotics could promote plant growth and development,improve crop yield and quality,and achieve fertilizer reducing,cost savings and efficiency increasing.It was worthy of popularization and application in production.