Mooring device used in helicopter cabin and operation method thereof

The invention discloses a mooring device used in a helicopter cabin and an operation method thereof. Two ends of a chain lock and two ends of a pin shaft are rotationally connected with a left side plate and a right side plate, protruding bosses are arranged on two sides of the front face of the chain lock, and a sleeve is arranged behind the chain lock; the hinge pin is located below the chain lock, the left clamping piece and the right clamping piece are arranged on the hinge pin, U-shaped grooves are formed in the bottoms of the left clamping piece and the right clamping piece, the top of the fixing piece is located in the two U-shaped grooves, and clamping grooves are formed in the positions, at the bottom of the fixing piece, of the left side plate and the right side plate. The bottoms of the left and right side plates are connected with the top of the hook; when the device is locked, the chain is fixed to the chain lock, the back face of the bottom of the chain lock makes contact with the lower side of