In order to reveal the effect of high-temperature closed shed with vegetable returning on greenhouse soil microbial communitystructure，the field experiments were carried out to study the effects of high-temperaturetreatments(direct high-temperature closedshed，high-temperature closed shed with vegetable returning and high-temperature closed shedafter vegetable returning with compostingagents，marking asT1，T2 andT3，respectively)on greenhouse soil chemicalproperties，bacterial and fungal community structure and metabolicfunction.The results showed that the direct high temperature closed shed significantly reduced the contentof active organic carbon and bacterialdiversity，but increased thefungal diversity.The soil alkali-hydrolyzable nitrogen and available potassium were increased by T2andT3，but both the fungal diversity index werereduced.The community structure of bacteria and fungi changed significantly before and after high temperature closedshed.The abundance ofBacteroidota，Acidobacteriota and Crenarchaeota were decreased afterclosedshed，but the abundance of Ascomycota wasincreased by16.42%-34.01%，and the greatest was obtained by hightemperature closed shed with vegetablereturning.The abundance of Fusarium was decreased by 1.46-7.03 percentage pointsafter closedshed，but increased by 0.46 percentage points without closedshed.Compared with the direct closedshed，the relative abundance of denitrificationfunction，ammonification function and nitrate nitrogen function genes reduced by the high temperature closed shed with vegetable returning orthe addition of compostingagents，while only the high temperature closed shed with vegetable returning reduced the relative abundance ofhydrocarbon，aromatic compounds and cellulose degradation functiongenes，and the application of composting agents increased the relative abundance of these three related carbon metabolism functionalgenes.Alkali -hydrolyzable nitrogen was one of the main factors affecting the community structure of soil bacteria and fungi after high temperature closedshed.Inconclusion，compared with the direct hightemperature closedshed，the soil microbial community structure and related carbon and nitrogen metabolism functions were changed by high temperature closed shed with vegetable returning orthe application of compostingagents.