Because the Steel Tube Confined Concrete (STCC) supports are built by pouring with concrete in the roadway, and the pouring hole is required on the steel tube of the STCC supports as openings, and should be reinforced. Combining the local opening reinforcement methods with the field production experience, three reinforcement measures are proposed as the pouring short tube, the sealing plug, and the strengthening plate, together with their parameters. By the area replacement method, the three reinforcement measures are shown to meet the grouting requirements in the roadway, as well as to ensure the reinforcement effect. By the axial compression test of STCC short columns and the pouring hole on STCC short columns, the reinforcing effect of the designed reinforced measures and some reinforcement parameters on the mechanical properties of the short column of grouting holes are analyzed. It is shown that the deformation and the load on the grouting hole short column are close to those of STCC short columns by the axial compression test, with the thickness increase of the sealing plug and the strengthening plate, the tested ultimate load on the grouting hole short column is slightly increased, which meet the requirements of the short column reinforcement. From the considerations of the constant strength requirements and the production cost of STCC supports, the thickness of the sealing plug and the strengthening plate are determined as 25mm and 8mm.