In order to improve the environment of tunneling working face to meet the requirements of production safety,this paper establishes the mathematical model of flow field in tunneling working face according to the actual situation.The flow field characteristics of the rotating shield jet ventilation in working face are simulated by using Fluent software.It also analyzes the impact of different injection angles and ratios of blowing and suction on flow field from the velocity and pressure distribution.The results show that when the injection angle isα=75°and the ratio of blowing and suction is amongβ= 0.8～1.2,the flow field’ s dust - control effect is the better.The results provide the theoretic basis for parameter selection and optimization in coal heading face ventilation;it also has certain theoretical research value and on - site guidance significance.