In order to investigate the effects of the combined application of green fertilizer and reduced chemical fertilizers on soil fertility，grape quality，and yield in ‘kyoho’ vineyards，field trials were conducted in Shouning County，Fujian province over two consecutive years.The field experiments were conducted with 7-year-old ‘kyoho’ grapevines，and four fertilization treatments were established.These included a traditional single fertilizer treatment as the control(CK)and three treatments where the application of chemical nitrogen and phosphorus fertilizers was reduced by 10%(T1)，20%(T2)and 30%(T3)，respectively，while planting leguminous green manure(smooth vetch).The results showed that compared with CK，planting common vetch in vineyards for two consecutive years significantly increased soil organic matter content by 26.09%-34.93%，significantly decreased soil total nitrogen content by 19.2%-32.8%，significantly decreased soil available nitrogen content by 5.2%-14.8%，significantly decreased soil available phosphorus content by 4.4%-36.3%，and significantly decreased soil available potassium content by 5.4%-6.0%.The effects of different treatments on the quality of grape soluble solids，titratable acid content，solid-acid ratio，pH value，and vitamin C content were not significantly different.In comparison，the T2 treatment(smooth vetch seed 45 kg·hm-2+ urea 240 kg·hm-2+ calcium magnesium phosphate fertilizer 600 kg·hm-2+ potassium sulfate 300 kg·hm-2+ compound fertilizer 960 kg·hm-2)had a better effect on improving grape quality，and its grape yield was 27.75 t·hm-2，with a significant increase of 14.4% comparing with CK.Additionally，when the green manure treatment was compared with CK after combining it，it was found that the titratable acid content decreased significantly by 8.0%，and the solid-acid ratio increased significantly by 11.1%.The weight of grape clusters increased significantly by 15.2%.In summary，planting smooth vetch in vineyards at a rate of 45 kg·hm-2 could replace the application of 20%-30% chemical fertilizers，improve soil fertility，enhance grape quality，and increase yield while reducing agricultural non-point source pollution.The results of this study could provide valuable information for the promotion of green manure planting in vineyards and the reduction of chemical fertilizer application.