Method for mounting pile winding crane with angle on water

The invention discloses a method for mounting a pile winding crane with an angle on water, which belongs to the technical field of pile winding crane mounting, and comprises the steps of S1, towing a carrier ship into a dock by using a tug, and mooring and fixing the carrier ship by using a mooring device on the side of the dock; S2, adjusting the fixing state of the carrier ship until the long side of the carrier ship and the length direction of the dock form an included angle of 15-20 degrees so as to enable a suspension arm of the pile winding crane mounted on the carrier ship to be parallel to the length direction of the dock; and S3, sequentially hoisting a rotary body, a frame A and the suspension arm of the pile winding crane to the carrier ship through a gantry crane, mounting in place, and completing overwater hoisting mounting of the pile winding crane. The carrier ship is fixed at a specific angle through the mooring device on the side of the dock, the gantry crane can hoist the pile winding crane