On the development and relationship between two-dimensional animation and three-dimensional animation. Animation must be familiar to everyone. It is constantly developing and growing in the development of biology, graphics and iconology, optics and other technologies. In the earliest development of animation, it was only used in industrial engineering. Later, it gradually developed into the current animation industry. It is not difficult to see that the development of animation is closely related to the development history of contemporary science and technology. This paper is a complete exposition of the development process of animation; The relationship between traditional hand-drawn animation and computer three-dimensional software animation is analyzed from many aspects. Keywords 2-D animation The development of 3-D animation is related to the rapid and diversified development of animation industry, which is closely related to the development of high-tech technologies such as biology, video and new media technology. This paper is to discuss with animators and friends who are learning animation or will learn animation with the rapid development of science and technology today. In the era of rapid development of science and technology, the traditional hand-drawn animation method is gradually replaced by the way of making animation with computer three-dimensional software. Nowadays, people seem to have a special liking for computer-generated three-dimensional animation. Does this mean that the traditional hand-drawn animation method is not important? Only by mastering powerful three-digit computer software can we be unimpeded in the hall of animation? In the process of learning animation, how to deal with and grasp it? This is the problem to be discussed in this paper. I. Development of Animation (I. Meaning of Animation) The English word animation is one of the types of movies, just like documentaries, drama films and experimental films. It refers to making a lifeless (inactive) thing into a movie (or TV) and then turning it into a living thing. Therefore, animation in a broad sense includes art forms such as newspaper clippings and puppet film. They are also called "art films" or "cartoons" in China. According to the international interpretation, it is "a film shot or produced one by one". The application of modern high technology, the birth of new media, the continuous extension of application fields, the continuous expansion of audio-visual language and the continuous innovation of materials and technology have fully developed and extended this concept. The fields involved in modern animation are no longer single, and the diversified development makes the animation itself more colorful. Earlier, a famous animation theorist once said, "Animation artists are creating the world like God." This sentence seems even more wonderful today. (Excerpted from /zj/smsdh.htm) Their most important features are two points: 1. Their images are recorded frame by frame with film or video. 2. The "actions" of these images are created by hallucinations, not by cameras. This illusion is the phenomenon of "visual persistence". When people see an object, even if it disappears immediately, it will stay in people's field of vision for about one tenth of a second. This is very important-when the projector projects on the silver screen at a speed of 24 frames per second, or the camera presents an image on the TV screen in a scanning mode of 30 frames per second, it will connect different frames, thus creating the impression that the organism is "moving" in our minds. So Norman Klein, an animation master, said: Animation is not the art of "animation", but the art of "painting movement".