Low resistivity wells were drilled successively in Longmaxi Formation of Changning area，and the gas-bearing properties of these wells were damaged to varying degrees. Based on the characteristics of low-resistivity shale reservoirs，seismic survey，structural and fault stages，logging，and core experiments，the research was performed on the causes and main influencing factors of low-resistivity shale gas reservoirs in Changning area. The results reveal that the daily gas production of low-resistivity shale reservoirs in Changning area show resistivity >5 Ω·m，total hydrocarbon display >2%，porosity >4.2%，gas content >2.0 m3/t，and gas saturation >60%. The low resistivity wells in Longmaxi Formation shale reservoirs of Changning area are mainly affected by faults. The compression by faults destroys the gas-bearing properties of reservoirs，which is characterized by relatively low resistivity，and the footwall exerts a greater influence on resistivity than the hanging wall；the shale reservoirs in the footwall are prone to low resistivity，while those in the hanging wall tend to be normal.In addition，the low resistivity wells in the study area are mainly related to the faulting stages. All the low resistivity wells in Jianwu syncline are controlled by the faults during the Caledonian. The natural gas in the footwall wells partially migrates to the hanging wall，and formation water enters the fractures induced by faults. Water accumulates in the structural low in a short distance，resulting in the low resistivity wells with a lower output. However，the natural gas in the hanging wall is enriched，leading to many high-yield wells. The low resistivity wells in Tiangongtang anticline and Shuanglong-Luo·chang syncline as well as to the west of Jianwu syncline are controlled by NE-trending faults in the middle and late Himalayan.Moreover，some low resistivity wells in Changning area are due to the decrease in resistivity caused by the higher water saturation of shale reservoirs near the fault.