The invention discloses a high-applicability pit excavating device for agricultural seeding. The high-applicability pit excavating device comprises a winding drum; the surface of the winding drum is in sleeve connection with a mounting strip; the surface of the mounting strip is fixedly connected with tapered blocks; a rotating shaft is arranged on the front surface of the winding drum in a penetrating way; mounting plates are respectively welded on the front surface and the back of the rotating shaft; a hollow sleeve is welded at the side, far away from the rotating shaft, of the mounting plate; the left side of the hollow sleeve is in sleeve connection with a push rod. The pit excavating device is provided with the winding drum, the mounting strip, the tapered blocks, the rotating shaft,the mounting plates, the hollow sleeve, the push rod, the support rod, a concave block, a fixed rod, a roller wheel, a locating block, a limiting plate, a first spring, a fixed bolt, a bolt and a handle which are matched for use, thus solving the problem that the existing pit excavating device is poor in applicability when in use; the high-applicability pit excavating device for agricultural seeding has the advantage of being high in applicability, increases the pit excavating efficiency of a user, reduces the labor force of the user, and is convenient to use by the user.