Abstract: Combining with the data of field pumping tests and laboratory tests, this paper discusses the scope of application of different hydrogeological parameters in engineering investigation. Problems that should be paid attention to in the application of parameter calculation are also presented. The experimental data show that permeability coefficient with pumping tests is 10 to 14 times of the results of seepage tests. Influence radius is 5.8 to 17.7 times of the Dupuit influence radius. And this study analyzes the reasons for this situation, pointing out that different calculation methods of hydrogeological parameters should be selected according to different requirements in engineering practice. Finally, the problems on parameter calculation (hydraulic conductivity, discharge coefficient and specific yield) process and application process are analyzed. Has some significance for understanding the various hydrogeological parameters. The results have the benefit for understanding the various hydrogeological parameters.