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Aiming at the problem of low reconstruction precision and poor efficiency, a new method of fast surface reconstruction is proposed. Based on the three spline interpolation and improved SIFT feature detection and matching method, first to two-dimensional image after pretreatment, detection of the boundary points and fitting, and then the area is partitioned by four quadrants, surface reconstruction with three interpolation spline boundary feature points, combined with improved SIFT feature detection and matching method detection of each region boundary surface, and then matching stitching. Experimental results show that the proposed algorithm can improve the time efficiency of the surface model, and the surface effect is good, smooth and smooth.