Analysis model of the single metal model was built by using ANSYS software.Under the conditions of high and low pressures,the effect on contact pressure of rotating and stationary ring by three key parameters,the hardness of Nitrile Butadiene Rubber(NBR)Oring,and the hardness of NBR supportring,and the incline angle of rotating ring were analyzed.The result shows that contact pressure of sealing faces of single metal seal is increased gradually from inner to external under low pressure,and contact pressure appears two side peak values and the middle mild distribution under high pressure condition.At lower hardness of Osing and rubber supportring,the pressure distribution of rotating and stationary ring is more mild,which is beneficial to decrease wear of sealing faces,and improves service life of seal.When the incline angle of tilted face of rotating ring is bigger,the contact pressure of sealing faces is more smaller and the distribution is more mild,sealing performance can be improved effectively.