Abstract: The defects and their random distribution in recycled concrete will affect the performance of the structure and make it difficult for recycled concrete to be used in superstructure construction. In the study, the steel cage of ordinary beams is transformed into a truss structure by adding specific structural steel bars. The steel-bar truss has appropriate bearing capacity and stiffness, which can be used to make up for the adverse effects caused by the performance defects of recycled concrete materials. The specimens of concrete beams were made by traditional binding reinforcement cage, specially by designed welded truss reinforcement cage, by ordinary concrete and recycled concrete, and the flexural performance tests were carried out to study the differences in bearing capacity, in crack development, in failure pattern and, in ductility coefficient. Through theoretical analysis, the general design method of reinforcing recycled concrete beam with steel-bar truss was obtained. The finite element models of the test beams were established to compare with the test results. The results show that the flexural capacity of recycled concrete beams can be improved to that of ordinary concrete beams with the same section by means of steel-bar truss. The stiffness can be strengthened to no less than that of the ordinary concrete beam of the same section according to the demand. The finite element analysis results are in a good agreement with the experimental results, and the laws reflected in the experimental research are general. The construction method is the same as the traditional concrete structure, no special materials and types of work are added, and the project is convenient to implement, can significantly save the cost of concrete recovery and recycled aggregate processing.