Waterway survey is an important work of waterway maintenance and management,and the indoor mapping of measurement data is the data basis of the electronic nautical chart,the digital waterway and other operations.Aiming at the problem that the traditional contour drawing and checking process consumes a lot of manpower and working hours in surveying and mapping,this paper uses IDW interpolation method and ArcGIS tools to design the contour generation method and optimization scheme,and then develops the contour generation platform.The practice shows that the new contour generation method has high productivity,and the contour generation platform can be extended and applied to waterway mapping.