Treatments including the control （CK）， deep tillage of 30 cm （T1）， biochar 15 t/hm² （T2）， and biochar 15 t/hm² + deep tillage of 30 cm （T3） were set up to conduct a field experiment to study the response of the properties of soil in paddy fields and the yield of rice to different agronomic measures in order to investigate agronomic measures for improving the quality of soil and increasing the yield of rice. The results showed that the application of biochar significantly increased the permeability coefficient in soil， organic matter， the yield of rice， the number of grains per panicle， and the biomass by 224.66%， 22.42%， 9.46%， 23.90%， and 6.51%， compared with that of the control. Deep tillage had no significant effect on the physicochemical properties of soil in paddy fields and the yield of rice. Biochar combined with deep tillage significantly increased the permeability coefficient in soil and the yield of rice by 184.25% and 9.93%， respectively. Biochar and deep tillage plowing had a significant interactive effect on the number of grains per panicle. The yield of rice and the biomass were significantly positively correlated with the permeability coefficient in soil and organic matter. There was a significant positive correlation between the number of grains per panicle and the permeability coefficient in soil. It is indicated that the application of biochar is an effective measure to improve the quality of soil and increase the yield of rice. It can improve the permeability in soil， increase the content of organic matter and the number of rice grains per panicle， and ultimately increase the yield of rice.