The discovery of the buried hill reservoir in the bedrock of the Hailar Basin has broadened the exploration areas of the peripheral oil fields of Daqing oil field. In this paper, the author studied the development characteristics of the crack such as the types, density, and width as well as filling period and development characteristics of the bedrock faults. It is concluded that there were three types faults which were early extensional faults, early extensional middle tensional-shear long-term active faults and early extensional middle tensional-shear late inverse long-term active faults. Their geometry characteristics, distance of the fault and the imaging logging data indicate that the crack is mainly formed in the process of the fracture structure, and the multi stages of fault activity of the bedrock caused the complexity of fracture development.