Pneumatic burr punching jig

The utility model provides a pneumatic burr punching jig, comprising an electrical box, wherein a horizontal working plane is designed at the upper part of the electrical box; a columnar fixing column is designed in the center position of the upper part of the working plane; a to-be-machined annular part sleeves the fixing column; a pressing cylinder is designed on a transverse beam at the upper part of the fixing column; a circular pressing plate is fixed at the lower end of the pressing cylinder; an impact cylinder is further designed on the working plane; a punching die is fixed at the stretchable end of the impact cylinder; a punching head, which corresponds to the shapes of burr positions of the annular part, is machined on the punching die. According to the pneumatic burr punching jig, the fixing column is specifically designed for the annular part, so that the annular part is difficultly deformed; meanwhile the punching head on the punching die can be specifically fabricated according to the shapes of to-be-removed burr positions, so that the adaptability is high, the noise is low, and the influence on environments, such as surrounding air, is less.