This machine is improved form the semi automaticdust free grooving machine, and the most humanisticoperation and design concept. Paper is continuously and automatically feed viarubber bell, it is up side and left and right side guidance ofthe fexible needle bearing,improve precision of boardfeeding, and keep the grooving precision and stable. The grooving length can be meters, it can get 8pcs groove at one time, it use special steel blade. groovevery smoothly and can use long time. Adjust angle form90-120 by handle with change different blade holder.