Abstract: The current trend of torpedo development is summarized by analyzing the change in torpedo technologies showed on the undersea defense technology (UDT) conferences and exhibitions held in Europe in recent years. With regard to the ideas of torpedo development, a more practical approach is adopted by major western countries to ensure the reliable and effective torpedo weapons in real warfare scenarios, which includes serial development of torpedoes and gradual improvement of torpedo performances on the basis of costeffectiveness principle and the method of “build－test－build”. As for torpedo design, the major improvements are currently focused on the fields of guidance, propulsion, stealth, and littoral operations, etc. The reliability, supportability and low cost are also pursued in design. In guidance system, the standard common bus, integrated design and open architecture system with commercialoffthe shelf (COTS) electronics are usually utilized for easy extension, rapid upgrade of software and hardware, and improvement of tactical performance. The practical results show that those ideas meet the requirements and can achieve significant comprehensive performances with minimum cost.