It is a kind of have expansion link mechanism grass trimmer include a driving unit,One cutter unit,One manipulation unit and an expansion link mechanism,Wherein two end of expansion link mechanism is respectively equipped with driving unit and cutter unit,And manipulation unit is set between what expansion link mechanism and driving unit,To start driving unit and interlock the cutting tool rotation of cutter unit,And expansion link mechanism include a fixing pipe group,One extension group and an adjustment component,Fixing pipe group have an outer tube and one wear what outer tube the first transmission shaft,Extension group have an extension and one wear what extension second driving shaft,And the extension and second driving shaft of extension group can slide respectively with respect to outer tube and the first transmission shaft. Thereby, the effect of adjustment of this creation tool extends length of tube, so that the user of different figures operates.一種具伸縮桿機構的割草機包含一驅動單元、一切割單元、一操控單元及一伸縮桿機構，其中伸縮桿機構二端分別設有驅動單元及切割單元，且操控單元設於伸縮桿機構與驅動單元之間，以啟動驅動單元並連動切割單元之切割工具轉動，而伸縮桿機構包括一固定管組、一延伸管組及一調整組件，固定管組具一外管及一穿設於外管之第一傳動軸，延伸管組具一延伸管及一穿設於延伸管之第二傳動軸，且延伸管組之延伸管及第二傳動軸分別可相對外管及第一傳動軸作滑移。藉此，本創作具調整延伸管長度之功效，以供不同身形之使用者進行操作。
