Reinforced concrete is the current main material to build liquid-storage structure. Because coarse aggregate and fine aggregate have different expansion coefficient under thermal environment, the expansion crack and leakage will happen. it will make liquid-storage structure failure. So thermal effect has become the most important factor that can not be ignored in the structure analysis and design. In this paper, adopting FEM software ANSYS, considering four-cell reinforced concrete rectangular liquid-storage structure at different temperature, heat-solid coupling numerical simulation analysis is proceeded, and the axial (shear) force and bending moment distribution are obtained.