Abstract: The depth of shaft construction was increased to kilometers with the increasing mining depth of coal resources in China. In order to better instruct the shaft grouting construction, research and perfect the flow and diffusion rule of clay cement slurry in the deep rock fracture environment, relying on the scientific research environment provided by the National Engineering Laboratory Research on Coal Mine Shaft Construction Technologies, for the first time, a simulation test of crack grouting under different shaft hydrostatic pressures was performed on a clay grouting test bench. The results show that there are interactions between the main grouting parameters, such as effective slurry dispersion distance, final grouting pressure, hydrostatic pressure, and fracture gap width, in the case of deep well fissures, and the relations between various parameters can be summarized by multiple regression analysis. The correlation equations can be used for the analysis and calculation of on-site construction; the three variation rules of grouting pressure over time are analyzed and summarized, and their correlations with the final grouting consequences are analyzed.