The invention relates to the field of auxiliary medical instruments, and discloses a naval therapy device. The naval therapy device is simple in structure, capable of bringing convenience for external use, free of any toxic and side effects, and capable of being recycled in a low-carbon environmental mode due to adoption of wood materials, preventing human skins from being allergic to adhesive plasters, and bringing ideal medicine naval therapy service for a naval therapy patient. The naval therapy device comprises a square wood board (2) provided with a round hole (1) in the center, elastic cords (3) connected at two ends of the square wood board (2) and a wood round cap corresponding to the round hole (1).