The utility model provides an automatic lasso system of pencil of full -automatic pencil processing equipment. Its characterized in that: cover elastic tape mechanism includes elastic tape feeding cutting component, elastic tape clamping orient subassembly, cover elastic tape action assembly, cover copper ring mechanism and the setting side by side of cover elastic tape mechanism are including copper ring feed orientation subassembly, cover copper ring action assembly, harness clip holds the mechanism and includes first fixed centre gripping ware, the fixed centre gripping ware of second, first removal holder, first fixed centre gripping ware corresponds the setting with cover elastic tape mechanism, the second is fixed the centre gripping ware and is overlapped copper ring mechanism and corresponds the setting, sharp reciprocating action can be done set up the frame through drive unit activity on to first removal holder between first fixed centre gripping ware and the fixed centre gripping ware of second. Its advantage lies in realizing that the automation of pencil tip overlaps elastic tape and cover copper ring's automatic lasso action, can realize the full -automatic productionof pencil processing equipment, improves work efficiency, reduces the cost of labor.