As 3D data scanning and rapid prototyping manufacturing standard in fact, STL(stereo lithography) is widely used in entertainment, manufacturing, Internet and other fields. Along with the 3D model is more and more complex, the data quantity of the 3D model is more and more large. It is difficult to get the complete topological relations quickly from the STL file, and it exists a large amount of redundant information in STL files, the two defects restrict the further optimization of processing and application of the STL mesh model. For these reasons, it is need to reconstruct the mesh of STL model. Based on 2-dimensional manifold model of STL triangular surface mesh, a fast mesh reconstruction method is proposed in this paper. Mainly using the saturated vertex deletion in the reconstruction process, in order to reduce the number of vertices which needed to be compared, and combined with the correlation of STL file data to improve the efficiency of vertex search and comparison. For a non-closed surface mesh, the algorithm to improve the efficiency of surface mesh reconstruction at the same time, also can effectively extract the boundary information of the surface mesh model. In addition, the reconstruction of the surface mesh data file is greatly reduces the storage space, and is effectively reduces the redundant data. Experimental results show that the efficiency and robustness of the algorithm in this paper.