Field experiment was conducted in order to comprehensively evaluate the effects of intercropping leguminous green manure on citrus growth environment and fruit yield and quality in the hilly areas of Sichuan，and to provide a theoretical basis for the promotion of green manure technology.In 2016～2018，Lathyrus sativus，Vicia villosa Roth and Trifolium repens were selected as interplanting plants，while clear tillage treatment as control，to study the effects of intercropping green manure on soil physical and chemical properties of orange orchard，weed control，citrus yield and quality.The result showed that after two years，three kinds of green manure treatments reduced soil bulk density，increased soil capillary porosity and aeration porosity，and significantly increased contents of soil organic matter，alkaline nitrogen，available phosphorus and available potassium.Intercropping green manure had significant inhibitory effects on weeds control，and the Lathyrus sativus and Vicia villosa Roth had the best effect.After intercropping green manure，the yield of citrus significantly increased by 13.6%～34.9%.The edible rate of fruits，vitamin C and soluble solids content increased significantly，and acidity decreased.In conclusion，intercropping leguminous green manure in orange orchards can improve soil physical and chemical properties，effectively inhibit weeds，and increase citrus yield and quality，which can be popularized and applied in citrus production.