With the development of high technology war. Bionic autonomous underwater vehicle has become a popular issue these years, To Achieve better concealment, the stealth technology is the most difficult problem that must be solved. This paper briefly introduces the principle methods to keep the AUV quiet and difficult to be found, the advantages and disadvantages of all these extraction methods were analyzed. The stealth technology of underwater vehicle refers to the means that make the enemy's sonar can't detect their own location or shorten the distance, mainly including two aspects: noise control and acoustic antagonism. Finally, the development tendency of Bionic AUV stealth technology is provided.