The injection of fracturing fluid causes a redistribution of reservoir pressures, altering external loads and the stress conditions, which in turn affects the casing’s strength and safety. To investigate the impact of fracturing conditions on the distribution of in-situ stresses, the theory of elasticity and the principle of stress superposition are applied in the present work. Based on the implicit/semi-implicit finite difference analysis method, this study takes an example of an actual well-established reservoir-cement ring-after perforating casing model; through simulation of the initial ground stress field and fracture process, this study analyzes how fracturing pump pressure influences the distribution of in-situ stresses. The research shows that when the calculated termination deformation value is set as 10–4, the max ground stress in the z direction is 60.25 MPa; when it is 10–8, the max ground stress is 60.91 MPa, and the difference between the two is 1.10%. When the fracturing pump pressure is 65 MPa, 80 Mpa, and 95 MPa respectively, the max ground stress in the z direction is 105 MPa, 129 Mpa, and 133 MPa respectively. When the pump pressure increases by 23%, the ground stress increases by 23%; and when the pump pressure increases by 19%, the ground stress increases by 3%. The approach presented enhances the precision of ground stress prediction under fracturing conditions and offers a load basis for the analysis of casing strength and safety.