The article constructs binocular vision 3D image structure by feature extraction and data acquisition of animated images, setting the base modeling points multi-level, establishing texture mapping modeling relationship, then designing key frame interpolation algorithms such as segmented cubic spline interpolation and quaternionic spherical linear interpolation, and applying geometric algebra to 3D animation modeling, and using a conformal geometric algebra approach to describe the 3D model as well as the dynamic model. Calculation results. The 3D animation modeling using the method of this paper reduces the error of 36.8mm compared with the same type of method, so the effect of using the method of this paper is better than 1other algorithms in 3D human body modeling. In the subjective evaluation of the visual effect of 3D animation video, 19 people think that the video has a strong sense of spatial three-dimensionality, and on the whole, the majority of people think that the animation video developed using the method of this paper is clear, realistic, has a sense of spatial three-dimensionality, smooth movement of the object, and the use of the lens is comfortable, which has a better visual communication effect.