The invention discloses a multifunctional catamaran. The multifunctional catamaran comprises two unit ship bodies (6), a fixed-connection deck (7), sorting doors (2), a lantern ring automatic assembling device (3), a sleeve ring rope net (5), a fixed sliding pole (4), a traction rope, an automation knotting device (8), a mechanical automatic control cabin (9), oil absorbent felt supporting rolling shafts (10) and oil absorbent felts (11). The two unit ship bodies (6) are connected through the fixed-connection deck (7) and are symmetrically arranged, and the inner side of a bow (1) of each unit ship body (6) is provided with one rotatable sorting door (2); the length of the two closed sorting doors (2) is the distance between the two unit ship bodies (6); the lantern ring automatic assembling device (3) and the sleeve ring rope net (5) are arranged between the two unit ship bodies (6); the automation knotting device (8) and the mechanical automatic control cabin (9) are arranged on the fixed-connection deck (7); and the oil absorbent felt supporting rolling shafts (10) are arranged on the tails of the two unit ship bodies (6), and the oil absorbent felts (11) are wound on the oil absorbent felt supporting rolling shafts (10). Space network layout in the catamaran is utilized for achieving multiple functions of clear floating oil absorption, aquatic transportation, fishing farming, efficient rescue, water safety swimming and the like