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This paper mainly focus on the issues of combining the station coordinates and ERPs based on the SINEX file,and discusses the constraints and normal equation’s reconstruction in the SINEX file in details.The combination model and computational steps are given.A weighted‐combination method based on the polynomial fitting residuals is proposed for the pole motion parameters.Computations and comparisons are performed using the proposed methods.The results show that the SINEX combination solution have the consistent accuracy with those provided by IGS.The accuracy of station coordinates in x and y direction is about 3 mm,and 4 mm in direction z.The accuracy of pole motion parameters and their rate are 0.02mas and 0.05mas/d respectively.The accuracy of ERP solution based on the SINEX file is higher than that of the weighted‐combination method.