Quick vent valve

The invention discloses a quick vent valve which comprises a vent valve body. A first cavity hole and a second cavity hole which are arranged correspondingly are formed in the vent valve body. A film cavity is formed between the first cavity hole and the second cavity hole in the vent valve body. A sealing film is arranged in the film cavity. The vent valve body is provided with a third cavity hole communicated with the film cavity. By the adoption of the quick vent valve, the automatic and quick exhausting function can be achieved, other extra operation is not needed, control is easy and convenient, the sealing performance is good, the structure is simple, assembling operation is convenient, and cost is low.