The utility model discloses a detachable sealing plate structure of a full-revolving propeller, which comprises a sealing plate and is characterized in that the sealing plate is composed of two semicircular plates, and the two semicircular plates are jointed with each other to form a closed ring shape; The L-shaped toggle plate connecting support is connected with the propeller in a welded mode and connected with the bottom plate through angle steel and a cushion block through bolts. And a zinc block is arranged at a proper position in the bottom plate for anti-corrosion protection. The utility model provides a detachable sealing plate structure of a full-revolving propeller. The sealing device is simple and attractive in structural form and convenient and fast to mount, dismount, repair,prevent corrosion and maintain subsequently, can effectively seal a gap between the full-rotation propeller and a barrel of the full-rotation propeller, prevents sundries from depositing in the barrel, can reduce eddies generated in the advancing process of a ship, and improves the sailing performance of the ship.