There are green spots in plastic wire drawing, which are caused by poor film formation and abnormal operation of mechanical equipment. According to the inquiry of relevant public information, plastic wire drawing is a main process of producing plastic woven bags. Wire drawing machine is the main production machine, and various additives such as polypropylene particles, masterbatch, color masterbatch and whitening agent are mixed in the machine. After mixing, the flat thread for producing plastic woven bags is made by melting, extruding, cutting, shaping and winding.