Electrically-controlled ventilation fence with air brake function

The invention relates to the technical field of marine ventilation grids, and discloses an electrically-controlled ventilation grid with an air brake function, which comprises a ventilation grid pipe and an air brake shell, one end of the ventilation grid pipe is connected with the air brake shell, a first electric hydraulic rod is arranged on one side of the outer wall of the bottom of the air brake shell, and a rack is slidably arranged on one side of the outer wall of the air brake shell; a plurality of blades are rotationally arranged between the inner walls of the two sides of the air brake shell, the upper sides and the lower sides of every two adjacent blades are in lap joint, gears are fixed to one ends of the blades, and the gears are meshed with one sides of the racks. The maintenance risk is remarkably reduced, opening and closing of the air brake are controlled through rotation of the blades, the sealing effect is guaranteed in cooperation with the sealing plate, and meanwhile local ventilation of