Abstract: 【Objective】 In order to study the effect of biomass charcoal application rate on the growth, development, and yield of winter wheat under drip irrigation. 【Methods】 Under drip irrigation conditions, a single factor randomized block experimental design was used to set up three levels of biochar application, namely 0 t/hm² (CK), 20 t/hm² (T₁), and 40 t/hm² (T₂), to study the differences in growth, development, and yield of winter wheat under drip irrigation under different treatments. 【Results】 The application of biochar improved the leaf area index of winter wheat, and the leaf area index of T₂ and T₁ treatments was significantly higher than that of CK and increased the chlorophyll activity of winter wheat leaves. The SPAD values of chlorophyll in T₂ treatment increased by 0.55%, 0.31%, 0.90%, 2.28%, and 1.41%, 1.18%, 2.95%, and 3.67%, respectively, compared to T₁ and CK treatment at the jointing, heading, flowering, and filling stages. In addition, the application of biochar significantly increased the dry matter accumulation of winter wheat and promoted the formation of winter wheat yield, with T₂ treatment performing the best at 8,244.40 kg/hm². T₂ treatment increased yield by 5.25% and 12.58% compared to T₁ and CK treatments, respectively. 【Conclusion】 Under the conditions of this experiment, it can be found that the application of biochar is beneficial for the growth and yield of wheat. Under the T₂ treatment of 40 t/hm² of biochar application, winter wheat yield performs well, which provides reference for field production.