The invention relates to a method for designing a virtual dental articulator for the functionality occlusal plane of a tooth crown and bridge. The method includes the following steps that (1) the three-dimensional trail information of lower jaw feature movement during individual chewing movement is recorded by a lower jaw movement trail analyzer; (2) the working coordinate system of the lower jaw movement trail analyzer and a dentition three-dimensional scanning coordinate system are subjected to registration and fusion; (3) static intercuspal occlusion tooth crown and bridge prosthesis CAD data are established; (4) an automatic virtual occlusion detection and automatic tooth migration platform is established; (5) automatic detection for virtual occlusion is conducted; (6) automatic virtual tooth migration is carried out, so that the CAD data of the tooth crown and bridge with the functionality occlusal plane are established. According to the method, the individual chewing feature movement of each person is simulated, precise quantitative automatic virtual occlusion detection and automatic virtual tooth migration are achieved, repeated adjusting and grinding are avoided when a patient tries on the prosthesis, and therefore the precision and efficiency for making the prosthesis are greatly improved.