The invention relates to a multifunctional module combined ocean platform and a use method. The multifunctional module combined ocean platform comprises a functional
deck module (1), lower supporting auxiliary single modules (2) and connecting modules (3), wherein the functional
deck module (1) floats on the water surface, and the connecting modules (3) are used for connecting the functional
deck module (1) with the auxiliary single modules (2). The functional deck module (1) is of an unpowered flat plate structure and used for configuring operation equipment, each auxiliary single module (2) is of a cylindrical structure with a circular or polygonal horizontal section, a generating set is arranged in each auxiliary single module (2) and used for driving a
jet propulsion device by the aid of an electrically-driven pump, and according to different use requirements, the ocean platform can be variously combined to use so as to achieve different requirements. The multifunctional module combined ocean platform is capable of arriving at a destination by means of self-propulsion, maneuvering performance can be improved, deck operation area can be widened,
material storage capacity can be improved, power configuration can be enhanced, and operation capability is improved. The multifunctional module combined ocean platform adopts the modular generalized design, so that product batches are effectively increased,
assembly line production of marine work equipment is realized, cycle is shortened, and cost is reduced.