Automatic smoke exhaust device for fire engineering

The utility model belongs to the technical field of fire-fighting smoke exhaust, and particularly relates to an automatic smoke exhaust device for fire-fighting engineering, which comprises a box body, a smoke suction component for sucking smoke on the outer side, a smoke sensor and a controller are arranged in a pipeline of the box body, and a fixed frame is arranged at one end of the box body; first fixing plates are arranged on the side wall of an inner cavity of the box body in a bilateral symmetry mode, vertical rods are rotationally arranged on the side walls of the first fixing plates through first bearings, and first bevel gears are arranged at the upper ends and the lower ends of the vertical rods correspondingly. When the mounting frame is disassembled, only a driving rod and a third bevel gear need to be driven to rotate through a knob, a vertical rod rotates along with the driving rod through a fourth bevel gear, two transverse rods are driven to rotate along with the driving rod through a first b