Coaxial reverse double-helix opposite-filling mixed fertilizer apparatus

A coaxial reverse double-helix opposite-filling mixed fertilizer apparatus is characterized in that a left shell and a right shell are respectively provided with a left fertilizer inlet, a right fertilizer inlet and a mounting hole on the upper side part, the left shell and the right shell are centered and fixed through screws, and the lower parts of the left shell and the right shell jointly form a fertilizer outlet; a left shaft diameter and a right shaft diameter of a fertilizer discharging wheel with an inner hexagonal hole in a core part are rotationally assembled with a front hole of a shell and a rear hole of the shell respectively, a left-handed spiral blade and a right-handed spiral blade which are the same in screw pitch and length are arranged on the fertilizer discharging wheel, and the circumferential phase difference of the two blades is 180 degrees. During fertilizer feeding, different fertilizers are added into the left fertilizer inlet and the right fertilizer inlet, and the two fertilizers a