Yanzhou District is located in the sloping plain of the southwestern part of the Mount Tai in the Luzhong Mountains. The west is flooded by the flood waters, and the flood alluvial landforms are obvious; the eastern waters are discharged to the southwest, and the terrain is inclined from the northeast to the southwest; the central Guangfu River and the Yangjiahe River are parallel and the terrain is low. The ground elevation is 60~38 meters, the height difference is 22 meters and the average elevation is 49 meters, and the average slope is 1/1500. The northeast is affected by the structure and is a shallow buried area of the Tertiary, with a large slope on the ground. The plain area is 64,670 hectares, accounting for 99.7% of the total area; it is divided into three types: micro-sloping ground, depression and slow-moving. The area is 45,601 hectares, accounting for 70.35% of the total area; the area is 12276.9 hectares, accounting for 18.94% of the total area; the area is 6792.2 hectares, accounting for 10.48% of the total area.