The present invention relates to a towable multipurpose fertilizer spreader for a tractor, which can adjust the amount of a fertilizer discharged through a discharge outlet according to the particle size of an organic fertilizer or an inorganic fertilizer by adjusting the fertilizer discharge outlet to have a large size when organic fertilizer is spread and to have a fixed size when inorganic fertilizer is spread. A characteristic configuration of the towable multipurpose fertilizer spreader for a tractor comprises: a trailer receiving a towing force from a tractor to be able to travel a hopper mounted on the trailer in a longitudinal direction, having both side surfaces thereof formed to progressively narrow towards a lower portion, having a discharge outlet defined in a rear lower portion, and accommodating an inorganic fertilizer or an organic fertilizer a main drive shaft mounted in the center of the trailer in a longitudinal direction to be rotated by a PTO shaft of the tractor moving means mounted in the hopper to receive a rotational force of the main drive shaft and move the inorganic fertilizer or the organic fertilizer accommodated in the hopper to the discharge outlet a shutter mounted on the discharge outlet to adjust a discharge amount depending on the inorganic fertilizer or the organic fertilizer that is accommodated in the hopper and spreading means mounted at a portion below the shutter to spread the inorganic fertilizer or the organic fertilizer while rotating by receiving the rotational force of the main drive shaft. The moving means comprises: a first screw mounted on an inner lower portion of the hopper to move the inorganic fertilizer or the organic fertilizer accommodated in the hopper in a direction toward the discharge outlet and a second screw mounted above the first screw to move the inorganic fertilizer or the organic fertilizer in a direction opposite to the discharge outlet.La présente invention concerne un épandeur dengrais polyvalent
