Analysis of steel surface interfacial bond stress-relative slip constitutive relationship in simply supported steel reinforced concrete (SRC) beams tensile region and compressive zone, a simplified calculation model is presented. The interface slip and the effect of the slip on the deformation of steel reinforced concrete beam under uniformly distributed loads are studied. Using elastic deformation theory, a set of analytical expressions for interfacial slip and deformation of simply supported SRC beams are obtained. These expressions can not only describe the interface slip distribution, but also account for its effect on the deformation. The present theoretical analysis bench-mark finite element analysis of load bearing capacity and deformation of SRC beams.