Abstract: The damage-fractured process of rock containing a single crack or double cracks under uniaxial compression and uniaxial tension is simulated using numerical test of rock failure RFPA for studying damage and fracture characteristics of rock containing cross cracks.The results show that the extended fractures are produced in the first at both ends of crack which angle is high under uniaxial compression.Fracture direction of specimen with double cracks is determined by crack angle in addition to the specimens containing conjugated cracks under uniaxial tension.The compression peak strength increases monotonically with another crack angle increasing when crack angle is 60°or 75°.The stress values in rock increase linearly with loading step increasing in the early stage of loading according to the stress images of different loading steps.The maximum value of maximum principal stress increases most rapidly under uniaxial compression.The maximum value of shear stress increases most rapidly under uniaxial tension.