The present invention relates to a plowing machine for a rotary tractor and a plowing method using the plowing machine, which are equipment for gathering soil between plows under the abandonment of crops.According to an aspect of the present invention, there is provided a rotary tiller for a rotary tractor, comprising: a frame installed in a tractor A rotating shaft axially fixed on both sides of the frame so that both ends thereof are rotatable A plurality of rotary blades having a plurality of rotary blades on the outer circumference of the rotary shaft And a power transmitting portion provided on the left and right sides of the rotary blade portion and including a first and a second wing capable of adjusting the width and depth of the trough and a power transmission portion receiving the power from the tractor and rotating the rotation shaft, A lower frame installed on the side of the crushing part And a seed supply unit coupled to the lower frame so as to be detachably connected in a one-touch manner, the seeds being received therein, and the seeds being automatically discharged by the rotation of the drive rollers, An insertion groove formed to be angularly inclined And a fastening portion formed to be spaced apart from the insertion groove by a predetermined distance, wherein the seed supplying portion includes: a body formed in a hopper shape so that the seed can be received A fixing pin positioned at a lower portion of the body and inserted to be engaged with the insertion groove, the locking pin preventing the body from being detached upward And a fixing protrusion formed on an opposite side of the bobbin with which the fixing pin is inserted and having an insertion hole formed therethrough so as to penetrate both sides thereof and being fitted and fixed to the coupling portion, A fixing part fastened and fixed by bolts A bent portion formed at an upper end of the fixing portion so as to be bent inward And a wing portion extending from the bending portion a
