Abstract: Aiming at the difficulty in modeling of matrix PDC bits and low efficiency.In this paper it is introduced that the moulds are produced by Flexible Die Forming.Based on the mould forming process the author summarized that at first design mould forming process,then determine the first mould technique,rubber mould technique and kaolin powder modeling technique.With the research result,matrix PDC bits have been made on trial basis.Indoor experiments show high mould production efficiency and exquisite profile with good continuance,high precision and consequently achieved the expected purpose.