Composite air valve

The utility model relates to the technical field of pipeline valves. The utility model relates to a valve, in particular to a composite air valve. The valve comprises a valve body, a valve cover, a first valve element assembly, a cylinder assembly, a second valve element assembly and a trace exhaust valve. The valve cover is arranged on the valve body in a covering manner; wherein a valve cavity is formed in the valve body; an inlet connected with a pipeline is formed in one end of the valve body, an outlet is formed in the valve deck, the cylinder assembly is installed on the valve deck, oneend of the cylinder assembly extends into the valve cavity, and the first valve element assembly is arranged on the cylinder assembly in a sleeving mode and can move along the cylinder assembly so asto open or seal the outlet. A first communicating hole, a second communicating hole and an exhaust hole which are communicated with the interior of the barrel assembly are formed in the barrel assembly; the micro exhaust valve