The automatic fertilizing machine belongs to the technical field of agricultural machinery. The technical problem needs to be solved is to provide an agricultural automatic fertilizing machine which can control the fertilizing amount, fertilize evenly and dose not require energy.

The technical proposal is that the automatic fertilizing machine comprises a fertilizer bin, a fertilizer inlet, a fertilizer outlet, a blade wheel, a transit axle, an agitator and a supporter. The fertilizer inlet and the fertilizer outlet are respectively arranged on and below the fertilizer bin. The blade wheel comprises a plurality of blades surrounding the center shaft sleeve of the blade wheel. The center shaft sleeve of the blade wheel is tightened and connected with the transit axle.

The agitator is corresponding to the fertilizer outlet. The fertilizer bin, blade wheel and the transit axle are installed on the supporter. The blade wheel of the automatic fertilizing machine drives the agitator to agitate the fertilizer at the fertilizer outlet of the fertilizer bin by the impact of the water flow.

The output amount of fertilizer is controlled by controlling the rotating speed of the blade wheel and moving the position of the agitator and fertilizer blocking device. The utility model meets the purpose of controlling the fertilizing amount and even fertilizing. The device is simple and low in cost.