Abstract: The article introduces the method of realizing the tooth arrangement design of the PDC Bif s three-dimensional parameter by user- defined function in Pro/E, and gives particulars on the process of completing tooth arrangement structure of the three-dimensional physical model from the parameter form.The theoretical calculation result indicates that the three-dimensional tooth arrangement model of PDC Bit's with the parameter method is precise and reliable. It provides an effective approach to enhance the tooth arrangement design efficiency of the PDC Bifs and improves the comprehensive production efficiency of new PDC Bit products.