The invention discloses a method for generating a smooth entity by contour lines. The method comprises the steps of: (1) inspecting and correcting a contour line to be used; (2) transforming the contour line into a Delaunay triangulation network by a Delaunay triangulation algorithm; (3) inquiring a obtuse triangle in the Delaunay triangulation network, and performing grid refinement on the obtusetriangle to convert the obtuse triangle into a Grid matrix grid, then generating a smooth entity. The step (3) specifically comprises: traversing all triangles and establishing indexing geographicalnumbers; when a triangle is an obtuse triangle and an obtuse angle is greater than 120 degree, performing grid refinement on the obtuse triangle and circumference according to the indexing geographical numbers and a row and column matrix; and deleting the obtuse triangle so as to obtain the smooth entity. A solid surface generated in the invention is a locally smooth curved surface, can provide obvious surface features and greatly improves the resource utilization rate and the result convergence rate of the high performance cluster computing of the smooth entity.