Adjusting structure, impact type instant freezer and air field control method of instant freezer

The invention discloses an adjusting structure, an impact type instant freezer and an instant freezer wind field control method. The adjusting structure comprises a lower pore plate which is arranged on the lower air inlet side of the instant freezer and is provided with a plurality of ventilation holes; the lower pore plate adjusting plate can move close to the lower pore plate and is provided with an adjusting hole; the upper pore plate is arranged on the upper air inlet side of the instant freezer and is provided with a plurality of ventilation holes; the upper pore plate adjusting plate can horizontally move close to the upper pore plate, an adjusting hole is formed in the upper pore plate adjusting plate, and the overlapped part of the ventilation hole and the adjusting hole is an air inlet hole; and the first driving assembly drives the upper pore plate adjusting plate and the lower pore plate adjusting plate to move and adjust positions so as to change the aperture ratio of the air inlet holes in the u