A kind of fast girdling knife, comprising: first slide mechanism, second slide mechanism and an elastic element etc. are formed. Wherein, first and second slide carriage mechanism, is to be made of ontology and slide bar； The elastic element, in the blind slot for disposing what first and second slide carriage mechanism, both ends abut against the blocking seat of the first and second slide carriage mechanism of what respectively. By by the blind slot of the blocking seat indentation first slide mechanism of second slide mechanism, forming in the blind slot of the blocking seat indentation second slide mechanism of first slide mechanism tight fit, keeping first and second slide carriage mechanism connection integral. And push down the first and second slide carriage mechanism and rotate 180 degree, it cuts the upper and lower ring cutting blade of the first and second slide to branch epidermis and marks upper and lower bipassage ring around tool marks, user is allowed to strip epidermis therebetween easily, carry out the continuous vegetative propagation program of Hou to facilitate. If cooperating the first and second peeling land, it can carry out cutting open the operation sequence in crack and de-epithelization simultaneously, the convenience in addition to that can increase operation can also reduce the time of skinning operations, promote working efficiency.一種快速環剝刀，包括：第一滑座機構，第二滑座機構，及一彈性元件等所組成。其中，該第一、二滑座機構，係由本體和滑桿組成；該彈性元件，係安置於該第一、二滑座機構之盲槽內，其兩端分別頂靠於第一、二滑座機構之阻擋座。藉由將第一滑座機構之阻擋座壓入第二滑座機構之盲槽內，將第二滑座機構之阻擋座壓入第一滑座機構之盲槽內，形成緊配合，使該第一、二滑座機構連結成一體。而壓住第一、二滑座機構並旋轉180度，使第一、二滑座之上、下環切刀片對枝條表皮割劃出上、下兩道環繞刀痕，讓使用者輕易剝除其間之表皮，以方便進行後續之無性繁殖程序。若配合第一、二剝皮齒刃，則可同時進行割開裂縫及表皮剝除的操作程序，除了可以增加操作的方便性，亦可降低剝皮操作的時間，提升工作效率。
