In order to solve the problem of Poisson equation, the author puts forward a research on the character image setting of 3D animation works. 3D animation refers to the three-dimensional virtual image produced by using computer software, also known as 3D animation, is a new technology produced with the development of computer software and hardware technology in recent years. It is the art of photography, set design, and stage lighting reasonable arrangement of various arts and techniques. At the same time, the design and production of 3D animation need more artistic foundation and creativity. A good 3D animation, it requires producers to have a better sense of space and artistic sense, there is must be a good use of all kinds of 3D animation production software. The image design of animated characters from the perspective of content, design styles and styles vary greatly from reality to non-reality. However, whether taken from nature or elsewhere, they are inseparable from their character as a vehicle for expressing human spirit and emotion. Since the birth of animation, its prominent entertainment function has become the value of the existence of this art style, and it has the possibility of development. And animated characters are more iconic than any other element of animation. The purpose of animation character design is to give appeal and vitality to each animation character art.