In order to determine the optimal combination ratio of microbial fertilizer and biochar in reclaimed rice areas，no fertilization and conventional fertilization were used as controls，on the basis of conventional fertilization，a single application of microbial fertilizer(1500 kg/hm²)and four different amounts of biochar(1500，2250，3000，3750 kg/hm²) were applied with microbial fertilizer.The effects of different treatments on rice economic traits，yield，rice quality，soil pH value and nutrients，soil enzyme activity and microbial quantity were compared.The results showed that microbial fertilizer combined with biochar significantly improved rice economic traits，yield and rice quality，and showed a trend of first increasing and then decreasing with the increase of biochar dosage.A comprehensive evaluation of economic traits and quality was conducted using the membership function method，and it was found that the treatment of microbial fertilizer combined with biochar of 3000 kg/hm² had the highest score.Compared with conventional fertilization，it significantly increased yield by 12.59%，increased the brown rice rate，milled rice rate，whole milled rice rate and gel consistency significantly by 0.82%，3.84%，5.24% and 6.23%，respectively，while decreased the chalkiness significantly by 25.58%.At the same time，the combination of the two fertilizers significantly increased the pH value and organic matter，alkaline nitrogen，available phosphorus，available potassium contents by 0.20-0.31，13.18%-33.48%，5.97%-15.73%，17.81%-39.83% and 6.19%-9.48%，respectively，compared to conventional fertilization.The activities of sucrase，urease，catalase and cellulase were significantly increased by 32.64%-54.91%，14.07%-35.56%，87.93%-137.93% and 5.30%-12.42%，respectively.The biomass of bacteria and actinomycetes was significantly increased by 35.88%-61.57% and 25.44%-39.91%，respectively.Fungal biomass significantly decreased by 7.34%-22.28%.According to the comprehensive score of principal component analysis，the treatment of microbial fertilizer combined with biochar at 3750 kg/hm² had the highest score.However，for economic considerations，it was recommended to apply the fertilization model of conventional fertilization and microbial fertilizer at 1500 kg/hm² with biochar at 3000 kg/hm² in local production.