The typical ship type of a small offshore fishery ship is selected to study the influence of the ship rifling type and attached body on the ship resistance performance. Through the numerical simulation analysis of the hull line type, the ship type coefficient and the influence of the conventional body such as bilge keel, spray strip and dead wood on the navigation performance of the small fishery ship, the ship line type is optimized, and the functional requirements of the small fishery ship are selected. The combination of the attached body and the improved performance of the fishery ship after the actual ship operation verification improve the expected target and can provide a reference for the design of the same type of ship.