Abstract: The modeling of groundwaterflow in a confined-unconfi ned aquifer of multiple irregular superposed subdomains was documented in the study． Finite element method(FEM)parallel simulation technique(PST)was used for simulation．C++ was conjointly used to edit the modeling codes program，which was run on a message passing interface(MPI)system—parallel virtual machine(PVM)．Through domain decomposition method under the MPI environment，the parallel model computing was then carried out．Finally，actual series of dynamic data of the exploited groundwater in Changzhou and Wuxi were utilized for the FEM parallel、simulation on a two co-jointly mounted Internet computers system.The studies demonstrate that data preparation for the parallel simulation was quite simple，and the results exhibite high data precision．