Abstract: In the study area, the groundwater movement is influenced by both regional water potential field and the distribution of karst pipelines. In order to reveal the properties of groundwater movement under the joint action of these two factors, a kind of GMS coupling with Darcy flow and non-Darcy flow was applied to simulate the karst system. Contour maps of groundwater table were got according to the numerical simulation results. It was found that: the groundwater flow was significantly affected by karst conduits in rainy season and unaffected in dry seasons according to contour maps of water table. This implied that the water levels lowed down the motherboard in karst tubes in dry seasons.