High luminance LED fluorescent light is replaced by halogen light in recent light parts. The housing cover of LED fluorescent light is used many several materials. Though deformity character has less value, polycarbonate cover has cheap, high strength and it is used general purpose. This study is several purposes. 1. No entering foreign matters during continuous extrusion manufacturing process in cutting process, 2. No deformity, exact cutting of pc length and finding method of cutting manufacturing process for polycarbonate cover