The invention discloses a gate structure capable of quickly and precisely adjusting the material discharge capacity. The outer side of a discharge outlet is provided with a gate fixing plate, a rack block is fixed to the middle of the upper side of the gate fixing plate through a spring, the two sides of the rack block are each provided with a rack of which a single side is oblique, the upper portion of the rack block is provided with extrusion handles which penetrate through side plate groove holes formed in the upper sides of the gate fixing plate, the two sides of the gate fixing plate are each provided with a sliding groove matched with a gate, and positioning teeth matched with the upper racks arranged on the rack block are connected to the two sides of the upper portion of the gate through fixing rods respectively. Accordingly, the structure is simple, operation is flexible, random graded adjustment of the gate from a completely closed state to a completely open state can be achieved in the equipment operation process, and when materials are micropowder or slurry, the sealing effect is more ideal.