Accompanying with urban development, investigating 3D geological structures, geological resources and environmental conditions, expanding the development space of the city has become an important task in the current urban geological work in the central urban area of Liaocheng. Constructing a three-dimensional visualization geological model of the central urban area of Liaocheng city has become a key carrier for this task. Relies on urban geological survey project in the central urban area of Liaocheng city, and considering various existing methods comprehensively, by using more than 2000 borehole data which can cover the entire area of Liaocheng central urban area, digital elevation data and geological reports of Liaocheng central urban area over the years, regarding regional geological maps as data materials and main basis, taking interactive modeling as main method, supplemented by automatic modeling, a three-dimensional visualization geological model has been constructed . On the premise of ensuring accurate data and visual expression, the modeling efficiency can be improved. For the first time, a 3D visualization geological model with a depth of less than 100 meters has been constructed in the central urban area of Liaocheng city. It can be applied to urban construction planning through scene settings and other functions. It can analyze geological conditions, such as routes, foundation pits and tunnels. It will provide geological services for urban management. It also can serve as a model for similar modeling in the middle and lower reaches of the Yellow River.