The definition of nuclear weapons accidents in the United States, the meaning of code names and the situation of nuclear weapons accidents that have occurred were introduced in this paper. And the emergency response strategy of U.S. nuclear accident was briefly analyzed. Based on the current situation of the development of nuclear weapons equipment in China, the deficiencies of the construction of emergency forces for nuclear weapons accidents in China were compared and analyzed. Ultimately, three suggestions from three aspects were put forward to provide reference for China's nuclear weapon accident emergency capacity construction.