Abstract: This paper uses a glass fiber reinforced polymer (GFRP) tube to strengthen an axial compressing angle steel component to avoid buckling. The axial compression experiments of nine specimens have been carried out for investigating the factors of three slenderness ratio and two kinds of reinforced structure forms. The experimental study show that the anti-buckling strengthening method has good operability. The GFRP tube buckling strengthening method improves the buckling capacity for compression angle steel members. The ductility of strengthened angle steel components is improved and the ultimate bearing capacity increases by 6.16% ~ 37.58%; the method of slenderness larger component reinforcement effect is obvious, and the failure mode must be changed. The results calculated by revised formulas for GFRP tube stiffness contribution coefficients proposed are in a good agreement with the test results.