As an undeveloped field, deep-sea resources have become the focus of research all over the world. Deep sea environmental survey is an important work for the development of deep sea resources, but the deep sea environment is bad and there are various unknown conditions. The deep-sea autonomous underwater vehicle has unique advantages in reducing platform costs, reducing casualties, and operating in harsh environment which has become an important tool for deep-sea environmental investigation. In this paper, the development status and key technology level of deep-sea autonomous underwater vehicle equipment are studied, the future development trend is predicted, and provides reference for relevant researchers.