To explore the applications of frass manure organic fertilizer in agricultural production,three different frass manures( yellow mealworm frass,black soldier fly frass and white-spotted flower chafer frass) and chicken manure were used as experimental materials,to study the effects of different organic manure application on soil pH value,conductivity,soil carbon content,soil enzyme activity and tomato yield.The results showed that,the total carbon and total organic carbon contents of soil treated by three frass manure fertilizer organic were significantly higher than those of chicken fertilizer treatment.Each or ganic fertilizer treatment significantly increased soil nitrate nitrogen,available phosphorus and available potassium content，and the effect of black soldier fly frass treatment was the best.Each organic manure treatment significantly increased soil phosphatase and urease activities,but had no significant effect on soil catalase activity.The white-spotted flower chafer frass treatment had the greatest influence on soil phos phatase and urease activity,which increased by 78.53% and 36.61%,respectively,compared with chick en manure treatment. Phosphatase activity was significantly positively correlated with soil water-soluble to tal carbon and water-soluble total organic carbon content.Urease activity was significantly positively corre lated with soil total carbon，total organic carbon,and water-soluble total organic carbon content,and was extremely significantly positively correlated with soil water-soluble total carbon content.Each organic fer tilizer treatment significantly increased tomato yield，and yellow mealworm frass,black soldier fly frass and white-spotted flower chafer frass treatments increased by 17.37%,12.52% and 18.25%,respectively,compared with chicken manure treatment．