Multifunctional floating type production, storage and unloading device and construction method thereof

The invention relates to the technical field of floating type storage and unloading oil tankers, and discloses a multifunctional floating type production storage and unloading device and a construction method thereof, and the multifunctional floating type production storage and unloading device comprises a bottom plate, a main deck, a bow transom plate, a stern transom plate and two side plates. According to the multifunctional floating type production, storage and unloading device and the construction method thereof, the bow section is arranged, a single-point cabin, an inner turret mooring installation piece, an outer turret mooring piece and a multi-point mooring piece are arranged on the bow section, an octagonal cabin is adopted in the single-point cabin of the bow section to conduct spatial isolation on the single-point cabin, and a single-point inner turret arrangement space with the maximum diameter being 30 m is reserved; an inner turret is arranged between an octagonal cabin and a forecastle body, a