Multifunctional rotary tiller

The utility model discloses a multifunctional rotavator which comprises a rotavator frame, a gear box installed on the rotavator frame, a rotary blade carrying axle arranged on an output shaft of the gear box and a ridge supporting device which is arranged on the rotavator frame and comprises a ridge supporting frame installed at the rear of the rotavator frame as well as a ridging plough and a press roller that are arranged on the ridge supporting frame; wherein the press roller is positioned at the rear end of the ridging plough, the ridge supporting frame is articulated with the rotavator frame, and a pendulous regulating device is arranged between the ridge supporting frame and the rotavator frame; in addition, the rotavator frame is also provided with a fertilizer drill unit which includes a fertilizer storage box, a fertilizer discharge mechanism installed on the fertilizer storage box, a fertilizer outlet pipe connected with the fertilizer discharge mechanism and a gearing that is arranged between the