1).24-hour continuous automatic feeding operation are controlled mass by computer. 2).Many small type computers control coloring technology accurately and regularly and can flexibly change the color , meet all kinds of demands. 3).In accordance of the production quantity flexibly change the feeding quantity. 4).Many feeding-pipe designs can grantee the variety of main materials. 5).Work safely with many kinds of controller and protection.6).Centralized feeding system can be made accordance with demands more than 1000 low ,convey distance is wore than 100m can be used in other fields besides plastic field.