Spring energized seal ring is applied in many fields,since it can maintain the sealing performance when microwear happens in its coat.However，its related research is scarce for the 2D model cannot be used to study the seal ring directly because of its spiral structure.The finite element model for spring energized seal ring was accomplished by three steps: first,the mechanical property of the initial 3D bended coilspring was attained by utilizing the numerical experiment;then,a 2D equivalent spring was designed which has the similar mechanical property with the initial one;and the last,the axial symmetry model of the whole sealing system was set up.This model can be used in analysis of ring’s assembly,and its validity is evidenced by the existing data.Consequently,this effective and timesaving model provides a new method for spring energized seal ring.