Abstract: In order to avoid local buckling occurring before overall buckling in steel tubular members under pressure， Chinese Code for Design of Steel Structures( GB 500172003) stipulates that diameter-thickness ratio D0 /t should not exceed 100( 235 /fy ) ． But the computing methods of different diameter-thickness ratio on the bearing capacity of steel tube under axial compression are generally given in foreign codes． This paper reviewed each code about the computing method of bearing capacity of steel tube under axial compression，whose result was compared with experimental result and then pointed out the differences among these codes．