Abstract: Laboratory rock hydraulic fracturing technology is the basic means to study the hydraulic fracturing crack propagation, but natural rock cannot directly observe the microscopic structure changes inside the material. In this paper, transparent rock-like materials that can directly observe the internal crack propagation are prepared by using epoxy resin. Based on the laboratory compressive and splitting strength tests, the similarities between transparent materials and real rocks are discussed. And then, the hydraulic fracturing test under different axial stresses was carried out. The results show that the prepared rock-like materials have good transparency and can accurately describe the basic mechanical properties of hard rock. The hydraulic fracturing cracking pressure and cracking time are closely related to axial stress, and the crack propagation direction is substantially at a 45 degree angle to the perforation surface. The relevant results can provide a reliable basis for rock hydraulic fracturing crack propagation test and theoretical research.