Engine valve capable of being prevented from falling off due to vibration

The utility model discloses an engine valve capable of avoiding falling off due to vibration, which comprises a base, a telescopic spring B movably connected to the inner side of the base, and a rubber pad fixedly connected to the tail end of the telescopic spring B. When in use, the valve is mounted on an engine, and a nesting block fixedly connected to the outer side of an anti-falling mechanism is fixedly connected to the outer side of the anti-falling mechanism. The anti-falling mechanism is installed in the nesting groove along the fixed rail, when the nesting block is embedded into the fixed rail, the anti-falling mechanism is rotated, the nesting block is moved to the inner side of the fixed rail, the nesting block is fixed through the outward extending force of the telescopic spring A, the nesting block is prevented from shifting when the air valve is used, and then a fixed plate at the upper end of the anti-falling mechanism is rotated out through a hinge. The base is fixed to the inner side of the e