The invention discloses a telescopic laryngeal support capable of being used for preventing snoring caused by tongue root glossoptosis in a sleep. When the telescopic laryngeal support is in use, an upper supporting plate at the upper end is used for jacking the jaw, a lower pressing plate at the lower end is used for jacking the laryngeal prominence so that the laryngeal prominence cannot move upwards, and snoring caused by tongue root glossoptosis is prevented. The positions and direction of the portions, making contact with the jaw and the laryngeal prominence, of the upper and lower ends of the telescopic laryngeal support can be rotationally adjusted as needed, and the overall length can be automatically changed in a telescopic mode, so that the requirements of different patients are met by adjusting the positions and directions of the upper supporting plate and the lower pressing plate and changing the overall length in the telescopic mode. The telescopic laryngeal support is always supported between the laryngeal prominence and the jaw no matter how the jaw swings up and down. The telescopic laryngeal support has the advantages of being simple in structure, convenient and effective to use and suitable for different crowds, opening a sleep respiration channel from exterior with a physical method, being good in snoring preventing effect, not affecting free movement of the tongue in the oral cavity and being safe to use and easy to carry and store.