The invention discloses a cage
engineering ship and a ship-borne cage construction method. The cage
engineering ship comprises a ship body, and a cage floating
pipe framework construction device is mounted in a floating
pipe framework construction launching area of a
deck of the ship body. The cage floating
pipe framework construction device is provided with a hot melting welder, a
winch, four guide rollers, a first limiting column and a second limiting column at relatively fixed positions. A first steel
wire rope and a second steel
wire rope are wound sequentially through the
winch, and buttwelding is completed by the hot melting welder, so that cage floating pipe framework construction is realized. By the cage
engineering ship, raw materials can be transported to a cage mounting sea area, then cage floating pipe framework construction is completed on the ship, and launching is performed, so that problems of difficulty in searching of
a site suitable for cage floating pipe frameworkconstruction and difficulty in launching in the prior art are solved. In addition, the
automation degree of cage floating pipe framework construction is raised, manpower resources required for cage floating pipe framework construction are reduced, and cage floating pipe framework construction quality is guaranteed.