The utility model provides a compound workover rig of dark rotary tillage deep fertilizing in the agricultural machine field, including tractor and frame, the tractor transmission is connected with the middle?transmission case, and the middle?transmission case sets up in the frame, and the transmission of middle?transmission case is connected with a drive mechanism and the 2nd drive mechanism, and a drive mechanism and the 2nd drive mechanism transmission respectively are connected with first rotary tillage arbor and second rotary tillage arbor, and the epaxial fixed mounting respectively of first rotary tillage arbor and second rotary blade has a rotary blade sets and the 2nd rotary blade sets, and the afterbody fixed mounting of frame has a middle?transmission 1, the utility model discloses use biax rotary blade sets to realize dark rotary tillage to combining the rotary tillage in an organic whole with fertilizer application operation, can once only accomplishing arable land, hack and fertilizer application operation, the operating efficiency is high, and can improve farming method fertilization quality.