SDBS fracturing fluid system of different concentrations and pH values will directly affect the stability of shale reservoirs, and then affect created fracture properties in Shale reservoir fracturing processing. Expansion deformation and wetting reverse of shale reservoir under the action of different concentrations and pH values of SDBS fracturing fluid were analyzed. The results showed that: Shale reservoir expansion deformation was minimized and swelling deformation rate was slowest in 0.02% SDBS fracturing fluid. The maximum contact angle of 30° was obtained in 0.03% SDBS fracturing fluid. Shale reservoir expansion deformation was minimized and swelling deformation rate was slowest in SDBS fracturing fluid with pH value of 8. The SDBS fracturing fluid with pH value of 9 and contact angle of 31.6° showed the best wetting reverse effect on carbonaceous shale. Comprehensive analysis showed that the influence of concentrations and pH values of SDBS fracturing fluid on shale reservoir characteristics has been quite different. That means that it is feasible to increase the rate of exploitation of shale gas by adjusting concentration and pH value of SDBS fracturing fluid.