Four groups of concrete-filled steel tube specimens with different internal structure forms such as setting stiffening ribs and reinforcing lattice angles were tested. The test results show that the inserted reinforcing lattice angle can delay concrete cracking in tensile zone and steel tube yielding in compression zone of specimens, and improve its bending behavior effectively. The finite element software ABAQUS is used to simulate the test specimens, and the finite element results are in good agreement with the test results. On this basis, the influence of the steel tube diameter to thickness ratio, steel-reinforced limb spacing, steel-reinforced size and steel-reinforced strength, concrete strength on the bending behavior of the concrete-filled steel tubular members with internal reinforcing lattice angle were analyzed. The results show that the main parameters that affect the bending behavior of members are the steel tube diameter to thickness ratio, steel-reinforced size and steel-reinforced strength. Concrete strength and steel-reinforced limb spacing have little influence on its bending bearing capacity. of specimens is calculated by using Chinese code. The bending bearing capacity and flexural rigidity of specimens is calculated by using Chinese, US and Europe codes, and the calculated results are compared with the test results. The results show that the calculation of bending bearing capacity is conservative by using Chinese code, the calculation of flexural rigidity is conservative by using US and Europe codes, while it is great error by using Chinese code.