FPSO outer turret supporting structure block installing, positioning and adjusting method

The invention discloses an FPSO outer turret supporting structure block installing, positioning and adjusting method. The method comprises the following steps that a, a guide beam is installed in the middle of a deck of an outer turret supporting structure block; b, guide clamping plates are installed on the two sides, corresponding to the guide beams, of the middle of an original ship deck; c, adjusting tools are installed on the two sides of a deck closure opening of the outer turret supporting structure block; d, jack bases are installed on the two sides of the adjusting tool; e, the outer turret supporting structure block is hoisted to a ship and preliminarily positioned through a guide beam and a guide clamping plate; f, a jack is installed between the adjusting tool and the jack base, and the jack is operated to conduct jacking till tight jacking is achieved; and g, the sea crane is unhooked, and the outer turret supporting structure block is finally positioned and adjusted by operating the jack and the