Abstract: 【Objective】 The purpose of this study is to analyze the effects of different additives on the quality change of Cyperus esculentus silage, so as to screen out suitable silage additives. 【Methods】 Three treatments with different additives were designed, which were 0.2% Lactobacillus plantarum (W₁ treatment), 0.5% cellulase (W₂ treatment), 0.2% Lactobacillus plantarum+0.5% cellulase (W₃ treatment). CK was used as control treatment, which was added with crushed Cyperus esculentus, and the fermentation period was 60 days. The changes of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), water-soluble carbohydrate (WSC), ammonia nitrogen (NH₃-N) and pH value of each treatment on the 0 th, 7 th, 15 th, 30 th, 45 th and 60 th days during fermentation were detected and the internal temperature changes of silage of each treatment after pit opening were dynamically monitored. 【Results】 Silage fermentation time and three additive treatments showed significant interaction in pH, DM, CP, WSC and NH₃-N of Cyperus esculentus silage (P< 0.01), and had significant influence on NDF and ADF (P<0.05). W₃ had the lowest pH, NH₃-N, NDF and ADF, and the highest CP, WSC and RFV contents. The stabilization time of W₃ after aerobic exposure was significantly higher than that of other treatments (P< 0.05), reaching 115 hours. Comprehensive evaluation order was: W₃ treatment > W₁ treatment > W₂ treatment > CK treatment. 【Conclusion】 All the three additives can effectively improve the quality of Cyperus esculentus silage, improve its nutritional value and prolong the aerobic stability time of silage, among which Lactobacillus plantarum (0.2%)+ cellulase (0.5%) has the best silage effect.