Multimedia imaging technology is widely used in many fields of modern life, such as traditional artistic expressions such as movies and dramas, and emerging computer multimedia technologies such as video image rendering, dynamic image processing and three-dimensional image processing are constantly emerging, providing viewers with better visual effects. At the same time, due to the limitation of shooting conditions or improper storage and reproduction, many video materials have different degrees of distortion, so it is particularly urgent to protect and repair these materials. In this context, we introduced different types of computer multimedia technology, and made a comprehensive and in-depth analysis of the media. This will help to optimize and improve the film and television production process, improve the quality of works, and protect historical video materials.