The utility model relates to a collapsible subsoiler belongs to agricultural machine technical field. This subsoiler includes: stand, left socle, right branch frame, left compression roller, right compression roller, left socle, right branch frame be the fixedly connected with supporting seat respectively, the one end of supporting seat is passed through the bearing and is connected the stand, left / right support is still connected respectively through left and right hydro -cylinder respectively to the stand, when left and right hydro -cylinder stretched out, left / right support was the horizontality, when left and right hydro -cylinder was withdrawed, left / right support was vertical state, two at least plough blade are installed through the shovel seat respectively to left socle, right branch frame, left and right compression roller installs on left / right support through the fixing base respectively. The utility model provides a subsoiler falls into two parts of bilateral symmetry with traditional subsoiler, by hydraulic cylinder drive, can fold, turns into the height, the direct transportation of being convenient for with subsoiler's width.