The present invention relates to a foldable tractor harrow, and more specifically, to be able to fold and unfold a pair of auxiliary harrow on both sides of the main harrow, so that only one auxiliary harrow of the pair of auxiliary harrow can be unfolded The present invention relates to a foldable tractor harrow having an auxiliary harrow fixture which can fix the other auxiliary harrow in a folded state of one auxiliary harrow so as to flexibly adjust the width of the harrow work as necessary. Folding tractor harrow according to the present invention, and the main harrow connected to the rear of the tractor； A pair of auxiliary harrows rotatably connected to both sides of the main harrow and folded upwardly and spread in a direction forming a straight line with the main harrow； A folding drive means for folding and unfolding the auxiliary harrow； When the auxiliary harrow is folded and unfolded by the folding drive means, the other auxiliary harrow may be fixed while the other auxiliary harrow is folded so that only one auxiliary harrow of the pair of auxiliary harrow may be unfolded. Auxiliary harrow fixtures； Including, the foldable drive means, and a pair of rotating plate is supported rotatably around the axis of rotation in each of the left and right symmetrical position of the fixed frame fixed to the tractor and provided with a chain connection at a distance away from the axis of rotation； It is connected to the chain connecting portion of the rotating plate and one side of the auxiliary harrow to pull the auxiliary harrow by pulling the auxiliary harrow in accordance with the rotational direction of the rotary plate, or by the self-weight by releasing the pulling of the auxiliary harrow And a driving chain for unrolling the harrow, and a rotating plate driving means for rotating the rotating plate in the forward and reverse directions, wherein the auxiliary harrow fixture restricts the rotation of the rotating plate while the auxiliary harrow is folded. An
