Analog printing preprocessing process

The invention discloses an analog printing preprocessing process. The screen deformation quantity during actual printing is reduced, and the service life of a screen printing plate is prolonged in an analog printing mode. The preprocessing process comprises the following steps: fixing a screen printing plate which is qualified through detection, positioning a roller on a central part of the screen printing plate and lifting a screen of the screen printing plate up to a certain height; moving the roller from the central part of the screen to an edge, turning the screen printing plate for 90 degrees and repeating the reciprocating motion of the roller to obtain the tension-released screen printing plate. By such a mode, the analog printing preprocessing process has the advantages that the tension release before printing is realized in the analog printing mode, the screen deformation quantity during actual printing is reduced, the sizes of patterns on the screen are prevented from being damaged by squeegee of a scraper to the screen in the printing process, the stability of the printing accuracy is improved, meanwhile the durability of the screen printing plate is guaranteed, wastes during the printing are effectively reduced, the production cost is reduced, and the added value of the product is increased.