When working in coordination，the submarine and UUV can complement each other，forming new combat capabilities and methods. This makes the submarine-launched UUV a research hotspot in the United States and other maritime powers in recent years. In this article，the mode of cooperative combat between submarine and UUV is studied firstly，and then the key technologies of the cooperative combat is analyzed based on combat requirements. Subsequently，the current development status of submarine-launched UUV is summarized. Lastly， several suggestions are put forward for development of submarine-launched UUV equipment in our country referring to the foreign experiences.