Abstract: The hydraulic fracturing breccia, sandstone vein, hydraulic fracture and activation synsedimentary fracture were recognized as the hydraulic fracturing products in the lower first member of Shahejie Formation in Dagang beach by observation of core and microscope. Hydraulic fracturing breccia can be joggled joint and the veins have clear fluid evidence. It is found that the fractures were developed in the crust around the uncompacted belt. Hydraulic fracturing experiments were conducted by using composite samples consisting of micrite(muddy siltstone)and sandstone. The relationship between hydraulic fracturing and rock type in sedimentary basin was analyzed. The low-permeability rocks and micrite(muddy siltstone)for modeling the crust of the overpressure system were broken under the action of overpressure fluid, while the sandstone for modeling the uncompacted belt of overpressure system was not broken. The experimental results coincide with the theoretical analysis and field observation of hydraulic fracturing made by others.