Based on the bionic coupling theory and according to non-smooth morphology of shells, mole cricket and other animals & plants, a new kind of bionic PDC tooth is developed. The analysis is made on the single tooth motion process before and after the wear by abaqus finite element software and the comparative analysis is made with the stress distribution state of the common PDC teeth. It can be seen that under the same conditions, the non-smooth PDC cutting teeth have better stress value and distribution state than the common PDC ones with good rock breaking effect. In addition, the abrasion ratio test is also made on these 2 kinds of cutting teeth; the test results also prove that the PDC bionic PDC teeth have some superiority.