Efficient energy-saving ventilation device for grain depot

The utility model discloses an efficient energy-saving ventilation device for a grain depot, and relates to the technical field of agricultural equipment. The fan comprises a working table, and a fan shell is fixedly installed at the top end of the working table. By the adoption of the technical scheme, the fan shell is driven by the wind energy motor to conduct air draft, air enters the fan shell from the air inlet cover after being filtered through the first filter plate and then enters the air collection chamber from the air outlet pipe, part of the air enters the air supply barrel in the air collection chamber, and the air supply barrel is driven by the wind energy emitted by the air collection chamber. A second bevel gear at the driving end of a rotating motor rotates to drive a first bevel gear to rotate, the first bevel gear drives an air outlet plate connected with a connecting shaft to rotate, air is sent out from an air outlet in the air outlet plate, then the air direction can be adjusted through r