Based on the results of a large number of experimental studies on the bond-slip launch of steel recycled concrete, the group tries to clarify the transformation law of chemical adhesive force, mechanical bite force and friction force in the process of applied load; analyzes the mechanism of bond evolution through fine view theory and peeling wear theory, and explains the principle that the bond force of steel recycled concrete is weaker than that of ordinary steel concrete; takes micro-segment theory for steel recycled concrete and gives the basic Equation of bond-slip from the perspective of elasticity. The basic Equation of bond-slip is given, and the formula of bond-slip is derived from the perspective of elastic mechanics. The results of the study can provide some reference for the design and calculation theory of steel recycled concrete structures.