This paper presents the experimental research on the bending resistance performance of 3 GFRP tube filled with steel-reinforced high-strength concrete flexural members. It studies that the GFRP tube fiber tangle angle, and GFRP tube thickness of GFRP tube filled with steel-reinforced high-strength concrete flexural members have an effect on mechanical performance of this investigation. The experimental results show that the flexural bearing capacity of members obviously increases with the decrease of the fiber tangle angle. The bearing capacity of flexural members increases with the thickness increase of GFRP tube. Based on the test study and theory analysis, a calculation method is proposed, and good agreement with the test results is achieved.