Based on the early paper,effects of cylinder's width ratio on the turbulent junction flow were discussed. The result indicates the triangular cylinder can control horseshoe vortices better with suitable increasing width ratio. A new vortex strength coefficient is defined (it is based on the position of vortex core and the vortex intensity). When width of triangular cylinder and thickness of wing are equal, the vortex strength coefficient is 27% of the baseline. Height of the triangular cylinder is only 1/ 20 of wing thickness and approaches the thickness of boundary layer. The triangular cylinder can control horseshoe vortices effectively, and will not cause serious change of whole flow field.