Low-noise servo speed gate

The invention discloses a low-noise servo speed gate which comprises a gate wing, a main gate and a base, an adjusting mechanism is arranged in the base, a secondary gate is arranged on one side of the top end of the base, rotating shafts are arranged at the center positions of one sides of the secondary gate and the main gate, and a connecting structure is arranged on one side of each rotating shaft. A door wing is arranged on one side of the connecting structure. The protective structures are arranged at the collision positions of the secondary gate, the main gate and the door wing, the surface of the protective plate is covered with the buffer plate, when the door wing collides with the buffer plate, the buffer force can be reduced by a little due to the material of the buffer plate, noise generated during collision can be reduced, the buffer plate can be made of a rubber pad and other materials, and when collision occurs, the buffer plate is not prone to falling off. When the door wing is opened or closed