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Considering shortcomings of the rectangle-mesh method,a method is proposed for drawing automatically meteorological contours by using triangle-meshes. The auto-drawing of contours was realized through interpolating on sides, triangulating,and then connecting the contours on the triangulated meshes in certain order. The algorithm of contour auto-generating is given and the contour charts drawn by the rectangle-mesh method and Grads are compared. The results show that the method is practicable and the resulting outcome is more accurate and reasonable.