In order to explore the effect of combined application of biochar and chemical fertilizer as base fertilizer，the effects of different application rates of biochar and chemical fertilizer on pepper plant growth，yield and components，dry matter accumulation，processing quality and fertilizer utilization rate were studied with pepper “Mingjiao 9” as experimental materials. The results showed that，compared with single chemical fertilizer(CF)，the combination application of biochar and chemical fertilizer was more helpful to the growth and development of pepper plants and the synthesis of chlorophyll. Compared with CF treatment，the combination of biochar and chemical fertilizer significantly increased the dry matter accumulation and yield of pepper，and the effect increased with the increase of biochar amount. The combined application of biochar and chemical fertilizer had a significant effect on the processing quality of pepper，in which the contents of dihydrocapsaicin，capsaicin，fat and the color value increased by 7.14%-13.39%，7.43%-16.89%，2.29%-7.79% and 0.51%-4.49%，respectively，but there was no significant effect on the types of volatile substances. Compared with CF treatment，the combination of biochar and chemical fertilizer significantly improved the agronomic utilization rate and fertilizer utilization rate of nitrogen，phosphorus and potassium by 53.71-97.24，67.14-121.55，22.38-40.52 kg· kg-1，and 57.93-113.55，12.87-19.19，60.28-80.79 percentage points，respectively. The results of this experiment can provide theoretical reference for selecting reasonable fertilization measures in pepper production.