In order to improve the economic properties of peach trees，the 9-year-old ‘Hujingmilu’ garden was selected as the research object，the conventional fertilization was used as the control，and the mixed application of different proportions of biochar，EM bacteria organic fertilizer and chemical fertilizer was used to study its effects on soil fertility，tree growth and fruit quality.The results showed that after the combined application of biochar，EM bacteria organic fertilizer and chemical fertilizer:①The pH value and fertility index of soil increased significantly.When the application rate was less than the control，the effective nutrient value was still not lower than the control；②The number of effective fruiting branches increased significantly，the number of prosperous and long branches decreased significantly，and the root activity increased； ③The quality index of peach fruit was significantly improved.Based on the experimental results and input-output ratio，the optimal fertilization method is 10.375 kg compound fertilizer with the ratio of biochar: EM bacteria organic fertilizer∶ chemical fertilizer (high potassium ternary compound fertilizer)= 3.750∶6.250∶0.375.