3D facial expression control is very important in biometrics. This paper gives a method of 3D facial expression control based on FAP & FAT from the MPEG4 standard.First,we find the key points and divide the face into several segments, and then generate 3D facial expressions based on Surface Oriented FreeForm Deformation. An expression proportion synthetic method is used for generating the specific face expressions.Finally, the experimental results show that the method presented in this paper can synthesize face expressions efficiently.