Abstract: To reproduce the accuracy objects of the problem in virtual reality, this paper presents an adaptive method to extract feature points suitable B-spline curve interpolation algorithm. Achieve a certain precision to meet the requirements of fitting the data points and control points inverse. The algorithm selected by the initial curvature infor marion of feature points as data points, then appling the method of energy minimization with linear constraints against calculated control point. By the control points and knot vector fitting B-spline curve, and find the maximum deviation of data points and curve points. The use of curve complexity indicators point to add new features, until the errors meet the accuracy requirements.