This creation is a kind of grass trimmer clamping tube type protective device of related adjustable height of what,System is mainly provided with the fixing piece of fixed plate and positioning plate composition in tool angle,The positioning plate upper hopper chute is set to wear interlocking with lockhole on its guide plate of adjustment part with locking part again,The lockhole of another its link plate of what adjustment part and lockhole on protector with locking part phase interlocking,Thereby,System by its operating stick top shoe phase interlocking of fixed plate and grass trimmer,So that above the cutting member of protector position what grass trimmer,To safeguard that cutting member and trees etc. will not be damaged,And when different height weeds to be cut,It then can adjust height distance between protector and cutting member,Accordingly,With reach cooperation it is different it is high,Short weeds,Carry out good cutting effect.本創作係有關於一種可調整高度之割草機夾管式防護裝置，係主要設有呈具夾角之固定板與定位板構成之固定件，又使該定位板上滑槽與調整件其導板上鎖孔以鎖固件穿設鎖接，另於調整件其連結板之鎖孔與防護件上鎖孔以鎖固件相鎖接，藉此，係將固定板與割草機其操作桿上滑塊相鎖接，以使防護件位於割草機之切割件上方，以維護切割件與樹木等不致受損，而當欲切割不同高度雜草時，則可調整防護件與切割件間高度距離，據此，以達到配合不同高、矮雜草，進行良好切割效果。
