Lolium multiflorum L. was selected as the material to investigate the effect of different planting methods including sowing and fertilizing on the productions of winter ryegrass and post-cropping rice in west Hunan. Three sowing rates, S1, S2, S3(18, 24, 30 kg/hm2, respectively) and two fertilizing amounts, F1, F2(780, 960 kg/hm2, respectively) were set-up, a total of 6 treatments(S1F1, S1F2, S2F1, S2F2, S3F1, S3F2). The results showed that the fresh weight of ryegrass in S3F2 was the highest(68 300 kg/hm2), and 31.09% higher than that in S1F1(P<0.05). The results of two-way anova showed that the interaction effect of sowing and fertilizing amount had significant effects on the dry weight and the total crude protein, crude fiber, calcium and phosphorus content per unit area of ryegrass(P<0.05). Sowing rate had significant effects on fresh weight, dry weight and total crude fiber, calcium and phosphorus content per unit area(P<0.05). The results of soil nutrient content after winter ryegrass showed that the soil pH and available P in all treatments were significantly higher than those before winter ryegrass(P<0.05). The contents of total N and available P in S3F2 were the highest(2.31 g/kg and 67.61 mg/kg), which were 12.68%(P>0.05) and 148.11%(P<0.05) higher than those before winter ryegrass. The actual yield, total grain of strain, solid grain of strain and 1000-grain weight of rice in S3F2 were significantly higher than other treatments(P<0.05). The yield of post-cropping rice was only significantly affected by the sowing rate of ryegrass(P<0.05), the interaction effect of sowing rate and fertilizing amount on rice yield was not significant(P>0.05). In conclusion, under planting conditions of 30 kg/hm2 sowing rates and 960 kg/hm2 fertilizing amounts, the ryegrass had the best fertilizer effect and could promote the yield of the post-cropping rice. The optimal condition is recommend to apply and promote in west Hunan.