Referring to the standard of harbor engineering, the calculation method for the vertical bearing capacity of the open-type steel cylinder pile is not very explicit. So designers often refer the Technical Code for Building Pile Foundations (JGJ 94—2008). We propose a new calculation method for the effect of blockage, which is verified by a practical engineering, so as to solve the problems of the standard JGJ 94—2008 Technical Code for Building Pile Foundations in that it considers only the depth into the bearing course and ignores the blockage effect of the overlying bed.