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Karstmassive medium can be regarded as dual porosity medium. Their aquifer is confined aquifer, and the hydrogeology model is isotropic and heterogeneous in type. According to the regulation of the groundwater movement in confined aquifer of karst massive, the authors establish an unsteady flow mathematic model of two-dimensional confined aquifer, using the finite elementmethod to get the solution, and taking the Kuiyong district of Shenzhen City as an example to verify thismodel. The results show that calculated and measured water levels are quite close, and the mathematic model is valid.