Different industry has different calculation method for bearing capacity of pile. Industry of railway, high way and building treat the tip bearing capacity of pile in different ways. DX pile is a new kind of varied cross-section pile. Applying calculation methods in the specification of these three industries on DX pile will induce significant different results. Based on 18 case of DX pile, the difference of calculation methods were discussed and a new design method for DX pile of bridge was proposed.