Based on the data of outcrops, cores, image logs and thin sections, the distribution characteristics and controlling factors of fractures in tight conglomerate reservoirs were discussed. The results show that there are three types of fractures which include trans-gravel fractures, gravel-edge fractures and intra-gravel fractures in the tight conglomerate reservoirs. Among them, trans-gravel fractures are dominant. The development degree of these fractures is controlled by the gravel composition, gravel size, contact relationship between gravels, interstitial material composition and structural location. The favorable areas for fracture development are the high part of structures and the fault areas, which are the favorable areas for natural gas accumulation.