The utility model provides a seal ring's processing frock, including holder and spacing sleeve, the one end of holder is equipped with the centre gripping round platform, the other end install in spacing sleeve and spacing sleeve threaded connection, spacing sleeve's bottom is equipped with the processing hole, waits to process seal ring and installs between holder and spacing sleeve diapire. Theaccurate machine tool machining that this frock can clamping seal ring realizes seal ring guarantees seal ring's machining dimension requirement, and efficiency is higher.