The current force generated by large container ships when berthed at the jetty is studied. By discoursing the formula in JTS 144-1-2010 Load Code for Harbor Engineering and formula in British Standard BS6349-1，a dimensionless comparison about the calculation method of current force and the related coefficients is carried out. Combined with engineering examples，the OPTIMOOR software is used to calculate and simulate the current forces of large container ships under different current angles. The results show that：1）The current force is very sensitive to the relative water depth ratio. 2）The transversal current force calculated by the British Standard is greater than the calculation result of the national standard，while the longitudinal current force calculated by the British Standard is much smaller than the national standard. 3）When the national standard is applied to calculate the current force，the projected area of the vertical and parallel water flow directions of the underwater part of the ship needs to be corrected.