Abstract: Through the application of dimensionless analysis,the data of fluid flow in porous media have been plotted to log-log type curve.In order to understand the rule of fluid flow in porous media.Based on test of much core,the pattern of petroleum flow in porous media have five forms:high speed,sub-high speed,linear,low velocity and super low velocity.And the marginal values of them have been obtained.Summarize,all pattern’s equation can be described as follows:.The physical and mechanical analysis of low velocity and super low velocity patterns has demonstrated the same conclusion with the experiment.And the starting pressure gradient has been demonstrated.Based on the new non-Darcy flow theory,typical examples of transient flow are studied.It is clear that the new non-Darcy model proposed here has significant advantages for study on fluid flow in porous media,and it can guide oilfield development.