Stable and reliable tuning fork crystal oscillator

The utility model discloses a stable and reliable tuning fork crystal oscillator which comprises a tube body and a lead, the bottom end of the tube body is provided with a lead top end, the outer surface of a crystal in an inner cavity is provided with a protection piece, the outer surface of a silver layer is provided with an aluminum layer, and air in the inner cavity reacts with the aluminum layer firstly, so that the silver layer is protected, and meanwhile the aluminum layer has good electrical conductivity. Aluminum oxide generated through reaction with air can also adsorb moisture in the inner cavity, the aluminum layer is arranged outside the silver layer, the silver layer is prevented from reacting with sulfur atoms in the air to generate silver sulfide, the conductivity of the silver layer is prevented from being affected, the silver layer is protected against good conductivity, the service life of the crystal oscillator is prolonged, and the supporting piece is arranged in the chromium layer. The u