The invention provides a coastal wind farm transport-repair-rescue operation ship. The ship comprises a hull and a main deck. The hull comprises a right demihull, a left demihull and a connecting bridge. The ship is characterized in that the portion above the main deck is an upper deck; from the head to the tail the main deck is sequentially provided with an anchor mooring system, an operation pre-treatment and a tail portion operation deck; a pilothouse, a crew cabin and a wind generator rush repair embarkation ladder are sequentially arranged on the upper deck; a forepeak tank, a bow thruster compartment, an empty compartment, an engine room, a fuel oil compartment and a fully rotary propeller compartment are arranged sequentially from the portion below the main deck from the forepeak to the stern. A bow thruster device is installed in the bow thruster compartment. The ship applies a twin hull type, optimizes the whole arrangement space, greatly increases the usable area on the operation deck area. In the condition of unsymmetrical demihulls, the motion performance indexes of the final ship are met through the calculation of hydrodynamic force performance. The coastal wind farm transport-repair-rescue operation ship is an unprecedented trailblazer in the domestic twin hull ship design.