Abstract: Taking Bozingen graben in the South Turgay basin of Kazakhstan as an example, a comprehensive study on its classification and the relationship between the graben and the oil reservoirs is conducted based on the reservoir rocks, strata, structures and their locations in faulted slope?break zone. The high?level slope break where incised valleys are mainly found is featured with thin layers, undeveloped reservoir rocks and dominated by faulted?block reservoirs. The medium?level slope break with relatively complete strata and developed reservoir rocks is dominated by faulted?block reservoirs and structural?lithological reservoirs, where broad and gentle gullies are mainly found. Located in the hydrocarbon source rock development area, the low?level slope break is dominated by condensate gas reservoirs in lithological traps, where lowstand fans are mainly found and the reservoir rocks are not developed. Based on the characteristics of these 3 slope breaks,it is considered that the gullies in the medium?level and high?level slope breaks are the favorable areas for oil reservoir exploration, and the low?level slope break is the favorable area for condensate gas reservoir exploration