High-speed displacement vessels can reduce resistance and increase speed by installing a reasonable bulbous bow. This paper takes the bulbous bow of a high-speed vessel as the research object. Without changing the total length of the vessel, this paper aims to optimize the hull resistance near the design speed by designing a new drag-reducing bulbous bow. First, based on the original bow lines, the lines of the bulbous bow are adjusted by altering the local characteristics of the bulbous bow. Then, using numerical calculation methods, numerical simulations of the bow wave-making, hull resistance, and hull attitude are carried out to compare and determine the optimal form of the new drag-reducing bulbous bow. Finally, based on the analysis and comparison of multiple schemes, the design parameters of such bulbous bows are summarized to provide a reference for the bulbous bow line design of high-speed displacement vessels.