Combined with percolation theory and network simulation,percolation network models were built to investigate the relationship between dispersion coefficients and permeability.Periodic boundary conditions,Hagen-Poiseuille law and law of conservation of mass were considered to simulate fluid flow through pipe network.In order to model dispersion,we supposed fluid perfect mixed in the pipe junction and solute particles obeyed Taylor dispersion at the scale of a single pipe.Method of moments was used to calculate the longitudinal and transverse dispersion coefficients.According to the expression of permeability obtained previously,the relationship between dispersion coefficients and permeability were deduced and accorded with published experimental data.