The problem of hydrodynamic scale -dependent dispersion is an important aspect of studying groundwater contaminant transport. Aiming at domestic and international study in scale -dependent dispersion, this paper summarized research progress of scale-dependent dispersion from lab and field. The proportion of causing scale-depent dispersion was counted under various influence factors in laboratory test, and the reasons for causing scale-depent dispersion were analyzed according to form data. Finally, study expectation of scale-dependent dispersion were proposed: (1) Testing the existence of scale-dependent dispersion; (2) Studying generation mechanism of scale-dependent dispersion; (3) Quantitative research on scale-dependent dispersion.