In this paper,the research status of foreign torpedoes is introduced,and the overall performance indexes such as range,speed and operational depth of torpedoes are explored. The enlightenment of foreign torpedoes to similar equipment development in China is put forward,which includes:1)Developing towards serialization;2)Improving homing performance continuously and promoting reduction in vibration and noise; 3)Innovating torpedo warhead technology;4)Developing lightweight torpedoes with multifunction and multipurpose; 5)Choosing appropriate technical approach of rocket-assisted torpedo delivery system according to maximum range requirement;6)Higher speed,longer range and deeper operational application no longer being the focus of foreign torpedo development. Relevant research can provide reference for the development of torpedo equipment in China.