The utility model relates to a two-line type treelike damping wire, which comprises two treelike damping wire segments, wherein cable clamps at two ends of the first treelike damping wire segment are connected with an overhead conductor; a cable clamp at one end of the second treelike damping wire segment is connected with the overhead conductor, and a cable clamp at the other end thereof is connected with a lacework stranded wire of the first treelike damping wire segment; the treelike damping wire system is hung on the overhead conductor (10) in interval; two ends of one lacework stranded wire in the treelike damping wire system are respectively clamped with cable clamps (A); and the lacework stranded wire is steel strand. The treelike damping wire has the characteristics of stable gripping force, abrasion resistance, no broken strand, no loosing, light weight and long service life, unfolded and beautiful appearance, and can meet low-frequency and high-frequency anti-vibration requirement of 35 kV or above long-spanned electric transmission line (including power line, earth wire and OPGW (optical fiber composite overhead ground wire).