With the development of fractured bottom water reservoirs，the phenomenon of bottom water channeling is becoming more and more serious，resulting in high water cut and inefficient production of oil wells. Strong heterogeneity is the main reason for water channeling in fractured bottom water reservoirs，and the core of water channeling control is to clarify the law of bottom water channeling and explore the efficient water plugging and profile control process of bottom water reservoirs. Based on the geological characteristics of Caogu 1 buried hill reservoir，the influencing factors of water channeling in the bottom water reservoir was analyzed and the optimal injection slug plug parameters of the water plugging system was optimized，which provided a theoretical basis for the water channeling control of fractured bottom water reservoirs. Firstly，with the help of the self-developed three-dimensional visual physical model of fractured bottom water reservoirs，the specific influence mechanism of bottom water energy，well control fracture location and heterogeneity on water channeling in fractured bottom water reservoirs was explored. Secondly，the slug parameter optimization experiment was carried out by selecting the temperature-resistant gel and nano-graphite reinforced foam system suitable for Caogu 1 buried hill reservoir. The experimental results showed that the bottom water energy increased from 1 mL/min to 5 mL/min，the inclination angle of the bottom water cone was reduced by 24°，the water breakthrough time was advanced from 0.20 PV to 0.11 PV，and the recovery rate was reduced by 8.5%. The inclination angle of the water cone at the heel end of the straight inclined well increased by 20° compared with that at the toe end，the water discovery time was delayed by 0.06 PV，and the recovery rate increased by 7%. In the low permeability zone，the heel end of the straight inclined well moved to the toe end，the inclination angle of the water cone increased by 25°，the water breakthrough time lagged by 0.09 PV，and the recovery rate increased by 6.1% . it was determined that the optimal slug injection combination was as follows：nano-graphite reinforced foam was injected first and then temperature-resistant gel，the optimal injection amount of slug was 0.3 PV oil layer，and the optimal slug injection rate was 3 mL/min，compared with the injection of single foam or gel，the inclination angle of the water cone increased by 37—39°，the water breakthrough time was delayed by 0.09—0.17 PV，and the subsequent recovery degree of bottom water flooding increased by 5.0 percentage point—12.3 percentage point. It provides a solution for water channeling control in fractured bottom water reservoirs.