The utility model discloses a hub casting machine ejector pin structure, the ejector pin comprises upper boom and lower beam, the lower extreme of lower beam is equipped with coupling mechanism, the upper end of lower beam is equipped with the locating hole, the lower extreme of upper boom is equipped with the reference column, reference column and locating hole phase -match, the reference column of upper boom inserts constitutes a complete ejector pin in the locating hole of lower beam. The utility model discloses be divided into upper boom, lower beam two parts with the ejector pin, the hole on ejector rod base is connected to the lower beam, and the lower beam on the different diameter circumference can not produce the interference each other, corresponds not unidimensional hub, only needs adjustment upper boom institute male position, greatly reduced the work load of the adjuster that brings because of hub dimensional change, improved work efficiency.