Abstract: Design methods of bending member for AISC 360-16 Specification for Structural Steel Buildings are explained and comparison is made between AISC 360-16 and GB 50017-2017. Design considerations and differences of bending member for two countrys codes are introduced. Three periods of calculation for the beam buckling are used and the calculating formula for elastic period are from formula of the critical force for beams flexure-torsion buckling, which are same as GB 50017-2017. The strength calculation of flexural member is listed in Chapter F of AISC 360-16, in which the flexural strength is M_n; the design flexural strength takes ϕ_bM_n; the flexural resistance coefficient ϕ_b=0. 9.