In order to further optimize the quality of the blade surface model, a blade surface smooth modeling method with uniform parameters is proposed. First, according to the curvature characteristics of the blade, the data points of each layer of section curves are divided into four parts: pressure side of blade, suction side of blade, the leading edge and the trailing edge. The center of the circle is used to generate the induced curve of the camber curve of the blade. Then, a series of inscribed circle centers of the profile of the blade section are obtained by the Newton iteration method, so as to obtain the camber curve, which is smoothed and arc length parameterized. Using the method of camber curve-thickness distribution, combined with the transition curve to generate a smooth cross-sectional contour curve to ensure the continuous curvature. Finally, a smooth blade surface model is generated by lofting and fusion optimization algorithms. This method is used for model construction and processing of data points of a certain engine blade. The result analysis shows that the optimized surface model has better smoothness, which avoids the problem of tool path fluctuation caused by the unsmooth model.