A field experiment was conducted to study the effects of trichoderma bioorganic fertilizer on the growth, yield and quality of eggplants under four treatments: no fertilizer (CK),conventional fertilizer treatment (T1), 30% less chemical fertilizer treatment than conventional fertilization (T2), 30% less chemical fertilizer treatment than conventional fertilization + trichoderma organic fertilizer (T3). The results showed that the height and stem diameter of eggplant under T3 were higher than those under T2, in which the height reached a significant difference; In terms of quality, soluble protein content under T3 was significantly higher than other treatments, and VC content under T3 was significantly higher than T2; In yield, T1≈T3>T2>CK, compared with CK, the output of T1, T2 and T3 increased by 23.90%, 14.27% and 20.19%, respectively, and which under T3 increased by 5.18% than T2; From the results of economic benefit analysis, the benefit under T3 increased by 8 769.60 yuan/hm² than T2; The results of principal component analysis showed that the overall growth and quality of eggplants were ranked as follows: T3>T1>T2>CK, and T3 had the highest comprehensive evaluation; The four treatments were divided into 3 categories by cluster analysis, T1 and T3 were classified into one category, in which T1 had good growth indexes, with the highest plant height, stem diameter and yield, while T3 had excellent quality indexes, with the highest contents of soluble sugar, soluble protein and VC. In conclusion, T3 can not only effectively improve the height and stem diameter of eggplant, but also significantly increase soluble protein and VC contents in eggplant, and effectively improve the quality, yield and economic benefits of eggplant.