Abstract: Floating platform plays an important role in the development of deepwater oil resources. The current force acting on the floating platform is usually considered to be a critical factor for platform design. Once the design plan is finalized, the principal dimension of the column is fixed, and the current force will be mainly affected by the cross sections. The FLUENT software is used here to compute the force of the columns with cross sections of different fillet radii in a uniform viscous flow. According to the computation, the current force of the column with a fillet radius more than 2 m will be reduced by more than 50%. The research results may provide good reference to the design of a new platform.