With the aid of the model experiment and the method of theoretical analysis，we analyze the distribution disciplinarian of gross dynamic hydraulic pressure and fluctuating pressure near the spur dike. After drawing the distribution isoline of fluctuation pressure, we divide the area near the spur dike into four areas for the measure pressure, and explore the distribution disciplinarian of gross dynamic hydraulic pressure and fluctuating pressure. The influential factors such as the length of spur dike, flux and depth of flow are also analyzed.