The invention discloses an automobile tyre valve and relates to a valve for inflating and deflating the vehicle, in particular to an automobile tyre valve of central inflation/deflation system of off-road vehicle tyre. The invention comprises an I-shaped obturating ring (1), a valve body (2), an O-shaped obturating ring (3), an elastic inner clip (4), a spring (5), a valve cover (6), a dust cap (7), a nut (8), a valve core (9), a membrane disk (10) and a membrane (11). The invention has a simple structure, low manufacturing cost and good pressure-keeping effect to the air pressure of the tyre, can ensure the rotary sealing air chamber has no air pressure when the vehicle drives to decrease the abrasion of the obturating ring, simplifies the structure of the central inflation/deflation system and decreases the hardware configuration of the vehicle.