A Vshaped metal sealing ring suitable for underground complex environment was proposed,and the sealing performance of the Vshaped metal sealing ring in the downhole inflow control valve was studied by simulating 40 MPa differential pressure working environment with a pressure sealing device.The mechanical model of Vring was divided into cylinder interference fit and cantilever beam mechanical model for theoretical analysis,a stress calculation formula of sealing contact surface was obtained and was verified by ABAQUS simulation.An axisymmetric model of the two sealing faces (planar seal and curved surface seal) of the Vring was established,the influence of different interference and inclination on the sealing performance was analyzed under the pressure difference of 40 MPa,and the sealing performance of the two structures was compared.The results show that on the premise of satisfying the sealing performance,the selection range of interference value of planar sealing structure is wider,and the contact stress under the same structural parameters is greater than that of curved surface sealing.The parameter selection range of the interference and inclination of the planar sealing structure was determined,which provides a reference for the design of Vshaped metal sealing ring in downhole flow control valve.The stress calculation formula also provides preliminary stress for the design of sealing ring.