✔♚♚ The model is a transparent, hollow, image, intuitive otolithosis simple teaching model, suitable for academic conference communication. ✔♚♚ detached, which is flexible; the position of the oval bursa saccule spot is made into a lid that can be opened, so that otolith particles (represented by small beads) can be put in or taken out from the place. ✔♚♚ The otolith particles can be simulated to be dislodged in the oval capsule; the otolith particles can be simulated to enter into the semicircular canal from the oval capsule and become the canal stone disease. ✔♚♚ Can simulate a single semicircular canal otolithiasis, can also simulate unilateral multiple semicircular canal otolithiasis, can also simulate bilateral semicircular canal multitubular otolithiasis scenarios;. ✔♚♚ Can simulate benign paroxysmal positional vertigo (otolithiasis) various manipulation process of restoration of otolith particles in the trajectory of the teaching model.