This subsoiler is an automatic agricultural machinery with various functions. Made up of frame, pole, plow share, soil separating board, leading bogie and strengthening tie bar. It can be installed on the left beam between the front and rear wheel. With adjustable ridge distance, automatic plow share and controllable depth; applicable for deep loosening of land and breaking up clods, matchable with seeding machine; with small turning radius, especially suitable for slope. Save fuel and labor; with good economic returns, suitable for promotion.