To study the bending performance of circular hole castellated steel reinforced high strength concrete beam, we designed four specimens, and then carried out flexural loading test. The results mainly show that the loading process of specimens can be divided into elastic stage, elastic-plastic stage and failure stage. During the loading process, the beam does not crack prematurely. And after yielding, the beam still owes high safety reserve. All the deflection value of specimens are beyond 14 mm when damaged, far surpassing the specification limit, which means that the beam has good deformation performance. Based on the test results, software ABAQUS was used to analyze the performance of specimens with nonlinear finite element method. And the finite element calculation results agree well with the test results. Based on the foundation, we used software ABAQUS to expand the analysis. The results show that the steel and concrete strength both have little effect to the initial elastic stiffness. With the increase of steel and concrete strength, the bearing capacity of specimens will gradually increase and the ductility coefficient will gradually decrease.