The invention discloses a mixing device for quickly mixing an organic fertilizer, wherein the mixing device comprises a first transverse plate; a transmission box is fixedly connected at the top of the first transverse plate, a first motor is fixedly connected at the back of the inner wall of the transmission box, a turntable is fixedly connected at the output end of the first motor, and a first fixed column is fixedly connected at the bottom of the front face of the turntable. By arrangement of the first transverse plate, the transmission box, the first motor, the turntable, the first fixed column, a first transmission rod, a fixed plate, a first fixed block, a sliding rod, a first sliding block, a second fixed column, a second fixed block, a second transverse plate, a shell, a second motor, a movable column, stirring blades, a feed bin, a discharge pipe, a control valve and support legs for cooperative use, the problem that nonuniform stirring is easily caused by slow mixing speed ofraw materials by a conventional mixing device is solved; the mixing device for quickly mixing the organic fertilizer has the advantage of fast stirring speed and is convenient for users to use.