The invention discloses a shutter type adjusting mechanism. The device comprises a sleeve, a support, a piston tube, a piston body, a plurality of hinge shafts, a plurality of sheets, a plurality of fan-shaped gears, a rack, a first magnet, a second magnet, a sliding chute and a blocking frame body, the sleeve is a bark oak cork tube with a round interior and a square shape, all the hinge shafts are sequentially arrayed from top to bottom, and the two ends of the hinge shafts are rotatably connected with the inner wall of the sleeve, a blocking frame body and a support frame are arranged in the sleeve, a sealing layer is arranged at the front end of the blocking frame body, hinge pieces are arranged at the lower end of the hinge shafts and are used for sealing the front end of the blockingframe body, the lower ends of the rest of the hinge pieces are respectively provided with sealing bodies except the lowermost page piece, and the fan-shaped gears are arranged at the rear ends of thehinge shafts, the piston tube is arranged in the support. Compared with the prior art, the shutter type adjusting mechanism has the advantages that the structure is simple, the operation is simple and convenient, and the sealing is reliable.