Abstract: Based on the fractal geometry theory, the fractal parameters(β、A、D) of the sacked cemented\|soil were measured and calculated by using the root\|mean\|square slope angle method (ARMSS). The joint roughness coefficient (JRC) was calculated. In addition, the shear strength was estimated by using the Barton's JRC-JCS model. Results showed that the ARMSS method was convenient to calculate JRC and its shear strength value was similar with the shear strength value by direct shear test, which was provided as the reference for the engineering design and construction.