Underwater operation platform and method for using the same

An underwater operation platform, comprising:

• a main body, the main body comprising a deck and a moonpool;
• two ducted propellers disposed at a tail end of the main body;
• a living building disposed on a front end of the deck;
• pile legs;
• a tower crane;
• a submergence module, the submergence module comprising a support plate, a plurality of truss members, and a base plate;
• lifting devices, each lifting device comprising a steel cable;
• and
• a gantry crane;
• wherein
• the main body is rectangular and comprises four corners;
• the moonpool is rectangular and runs through a molded depth of the main body;
• the pile legs are disposed at the four corners of the main body, respectively;
• the tower crane sleeves one of the pile legs disposed at the tail end of the main body;
• the deck comprises two parallel pathways which are located at two sides of the moonpool, respectively, for supporting the gantry crane;
• the lifting devices are disposed on the deck and are close to four corners of the moonpool;
• a surface area of the submergence module is less than that of the moonpool;
• each lifting device is connected to one corner of the submergence module via the steel cable;
• the support plate and the base plate are integrated with the plurality of truss members;
• the main body further comprises inner side walls facing the moonpool, and the inner side walls are provided with watertight doors communicating with operation cabins of the main body.