Abstract: The unique orbital angular momentum (OAM) of acoustic vortices presents promising applications in particle manipulation and acoustic communication. However, in ocean waveguides, the complex and variable channels make the propagation characteristics of underwater acoustic vortices unclear, limiting their application in underwater acoustic communication and related fields. This paper conducts preliminary research on the propagation characteristics of acoustic vortices in different underwater environments. Theoretical analysis and simulation results indicate that: 1) With other parameters unchanged, the spacing of interference fringes of acoustic vortex phases is only related to the ratio of frequency to propagation distance; the larger the ratio, the smaller the spacing. 2) When considering sea surface reflections, the acoustic vortex gradually disappears as the propagation distance increases, and the larger the topological charge, the greater the impact of sea surface reflections on the vortex. 3) Acoustic vortices near the axis of deep-sea sound channels can propagate stably over certain distances. The findings provide a theoretical foundation for applications in underwater communication and detection based on the orbital angular momentum of acoustic vortices.