This article discusses the pre-print process of the silk map in detail,puts stress on the analysis of the color separation for maps,including the chosen of spot color,the selection of screening frequency and angle as well as the overlap process.

Trend of prepress processing and plate making technology and information communication and share and integration between multimedia is presented in the light of new products and technolgies at Drupa 2000,it is shown that print media has become an important output unit of digitized society,demand on print media is continuously increasin

Effects on frequency aliasing during prepress processing are analyzed and discussed according to the theory of digital signal processing, and some methods are given to improve the output quality of images, graphics and characters by using anti aliasing techniques, which can be used to guide the actual reproduction.

This article explains with the cases of the prepress processing of the Chinese-traditional version periodical published in the China s mainland,analiyses the quality of the conversion methods of the Chinese simple and traditional character and discusses the characteristic and merit of the self-made software which benefits the artificial intervention during the actual work.