The invention relates to the technical field of agricultural equipment and discloses a variable fertilizer discharge which comprises a base, a control device, a fertilizer discharge device and a rotating device, wherein the control device is mounted at the front end of the base; the fertilizer discharge device is mounted at the rear end of the base; a discharge hole is formed inside the rear end of the base; the fertilizer discharge device comprises a fertilizer tank and a double-disc mechanism; a cover body is connected with the upper part of the fertilizer tank; the lower part of the fertilizer tank is connected with the discharge hole through the double-disc mechanism; a discharge hole is formed in the cover body; the rotating device is mounted on the cover body; one end of the rotatingdevice penetrates through the cover body and is connected with the double-disc mechanism. The variable fertilizer discharge has the beneficial effects of being simple in structure, low in energy consumption and low in labor cost, the fertilizer use amount is effectively reduced, the utilization rate of a chemical fertilizer is increased, the living environment of crops can be improved, and sustainable and stable development of agriculture is promoted.