Aiming at the problem of uneven distribution of flue gas at the end of the sintering cycle，the flue gas flow simulation study is carried out on the flue gas distribution end of the flue gas circulation system of 360 m² sintering machine Handan Iron & steel Group Co.，Ltd. by computational fluid dynamics，and the flue gas distribution on the sintering material surface under the existing side inlet conditions is analyzed，and the improved uniformity of the convective field of arc deflector，straight angle deflector and well deflector is analyzed respectively. The results show that under the condition of the existing side air inlet，the flue gas in the sealing hood is concentrated on the material surface opposite the air inlet， and there is a large space for optimization of flue gas equalization. In the improvement analysis of the convection field of the deflector，the arc deflector improves the uniformity of the airflow on the material surface by 20. 69% ，the straight angle deflector improves the uniformity of the airflow on the material surface by 13. 71% ，and the well deflector improves the uniformity of the airflow on the material surface by 57. 93% . The well deflector structure improves the performance of the uniform distribution of circulating flue gas on the sintering material surface，and its processing difficulty is easier than that of the arc deflector，and at the same time，it does not affect the normal passage of workers during sintering maintenance， which can improve the flue gas distribution on the material surface at low cost.