Abstract: Generally，because of karst growth， the velocity and direction of groundwater has great difference in space in the karst area． So the build-up of numerical model for simulating the groundwater flow and solute transport is very difficult． However，in practice，the movement rules of fissure water in the dolomite was found to conform to that in pore water． At the same time，solute transport mechanism conforms to basic conditions required for the diffusion theory． Taking an industrial site in Songtao County as an example，it was studied the dispersion parameter of groundwater quality in the dolomite formation and verified the numerical model through the field test． Visual MODFLOW computer software was used to establish the numerical model． Through the verification，the numerical method could simulate groundwater flow and solute transport in argillaceous dolomite stratum．