Concave die used for thin plate high-speed punching

The invention provides a concave die used for thin plate high-speed punching. The concave die is used for overcoming the defect that when materials such as thin plates are punched at a high speed, puncher pins and concave dies are prone to suffering from tipping damage. The concave die is provided with a punching through hole. An annular groove perpendicular to the axis direction of the punching through hole is formed around the inner surface of the punching through hole, and the annular groove is located above the lowest point of the stroke of a puncher pin. According to the high-speed punching concave die, the inner surface of the punching through hole is designed to be of a structure with the annular groove, part of air can be kept in the annular groove, the negative pressure state in the punching through hole is destroyed, waste is effectively prevented from being brought in the concave die again, and therefore the situation that the waste gets stuck to damage the puncher pin and the concave die is avoide