To evaluate the practical application and ecological benefits of orchard grassing, this study conducted a meta-analysis based on 81 publications from 1995 to 2024. The effects of grassing on fertilization efficiency, carbon sequestration, yield improvement, and fruit quality enhancement were assessed. Additionally, the eco-efficiency of orchard grassing was compared across five factors: grass species type, grassing duration, temperature, precipitation, and elevation under varying environmental conditions. The results showed that: 1) there were 40 orchard grass species types, belonging to 5 families, of which Leguminosae (16 species) and Gramineae (16 species) were the main families, accounting for 80.0% of the total number of species, and the main varieties of grasses were white clover (27.4%), ryegrass (12.4%), alfalfa (6.2%), and hairy-leaved camphor grass (4.9%). 2) Grassing has significant fertilizer efficiency, increasing the orchard soil organic matter, total nitrogen, total phosphorus, total potassium content by an average of 27.3%, 27.4%, 25.8% and 23.3%. 3) The average grass carbon fixation in grassed orchards was 8.86,soil and fruit nitrogen fixation increased by 2.14 and 1.42，respectively, compared with that in clear-cutting orchard. 4) Grassing increased yield per unit area, weight per fruit, and soluble solids by an average of 20.9%, 9.3%, and 9.6%, respectively, and reduced titratable acid by 4.9%; 5) Leguminous grasses were more effective in enhancing soil nutrient retention and carbon sequestration, whereas graminoid grasses contributed more to yield and quality improvement. These benefits increased with longer grassing durations; 6) The areas under natural conditions where the average annual air temperature is in the range of 10—20 ℃, the annual precipitation is between 400—800 mm, and the elevation is in the range of 400—800 m, are conducive to the ecological benefits of grassing in orchards. This study provides a scientific basis for the optimization and promotion of orchard grassing technology, which can guide orchard managers to precisely adjust the grassing strategy, in order to achieve the coordinated enhancement of orchard ecological and economic benefits.