［Objective］This study explores the effects of different grass coverage on the stability of soil aggregates in economic fruit forest, and reveals the response of soil properties and aggregates to grass cover in economic fruit forest forests and their coordinated regulation mechanisms.[Methods] Soils of economic fruit forests with light-leafed camas (T1), fertilized radish (T2), pinto peanut (T3), and the mixed sowing of light-leafed camas, pinto peanut, and broad-leafed tamarind (T4), the effects of grass mulching on the stability of soil aggregates were analyzed by applying the wet sieving method and Le Bissonnais method. [Results] ①Under the wet sieving treatment, grass mulching significantly increased the content of water-stable macroaggregates (>0.25 mm), as shown in T3 (83.47%) > T1 (82.20%) > T4 (79.98%) > T2 (76.75%) > CK (74.30%), and the mean weight diameter (MWD) and geometrically mean diameter (GMD) were significantly elevated compared to clearing tillage. ②Under Le Bissonnais method treatment, fast wetting (FW) had the greatest disintegration of >2 mm particle size aggregates, slow wetting (SW) had the least destructive effect on aggregates, with the percentage of <0.25 mm particle size ranging from 15.02 to 23.81%, and the highest increase in stability indexes was observed with pre-wetting followed by disturbance (WS). The aggregates stability showed SW>WS>FW.The difference between RSI and RMI was significant, RSI>RMI, among others T2 treatment had the smallest value of RSI, and T3 treatment had the smallest value of RMI. ③The mean values of soil fractal dimension under dry sieving and wet sieving treatments were 1.89 and 2.46, significant differences in fractal dimension (D), structural damage rate (PAD) and unstable aggregates index (ELT) s were observed under different raw herbaceous treatments, and the PAD value of the T1 treatment was reduced by 16.25% compared with that of the CK, and all the treatments of T1-T4 significantly reduced the ELT value, especially the T3 treatment reduced it by The T1-T4 treatments all significantly reduced the ELT values. Correlation analysis and pathway analysis showed that the stability of soil aggregates was affected by total porosity, capillary porosity, bulk weight, soil organic carbon and mechanical composition, of which soil organic carbon was the key factor. [Conclusion] Grass mulching significantly enhanced the stability of soil aggregates, optimized soil structure in the economic fruit forest by attenuating the dissipative damaging caused by heavy rainfall or irrigation impacts on aggregates. Among them, two types of grass mulching methods, namely, fertilizer radish and pinto peanut,showed significant advantages in practice.