1.24 hours continuous automatic feeding operation are centralized controlled by microcomputer; 2.Many small microcomputers control coloring technology accurately and regularly and fexibly 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 guarantee 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 10m convey distance is more than 100m can be used in other fields besides plastic field.