Abstract: In order to study the flexural performance of glass fiber reinforced polymer (GFRP) tube filled with steel bars/concrete hollow members, a nonlinear analysis program was developed. The effects of main parameters such as hollow rate, reinforcement ratio, GFRP tube wall thickness and strength grade of concrete were analyzed systematically. The program was verified by test. The calculation formula of the bearing capacity of GFRP tube filled with reinforced hollow concrete members was established. The results show that the calculation results are in good agreement with the test results by using the nonlinear analysis program and the established bearing capacity formula. The flexural bearing capacity increases with the decrease of the hollow rate and the increase of the reinforcement ratio, the GFRP tube wall thickness and the concrete strength grade. The hollow rate has the greatest influence on the flexural bearing capacity, followed by the reinforcement ratio and the thickness of GFRP tube wall thickness, and the concrete strength grade has relatively less influence on the flexural bearing capacity. The radius ratio of hollow part should be 0.25-0.5. The flexural bearing capacity of the hollow members can be compensated by properly increasing the reinforcement ratio, GFRP tube wall thickness or concrete strength grade. The research conclusion can provide reference for the practical application of the GFRP tube filled with steel bars/concrete hollow member structure.