Guide vane air valve and flow adjusting device

The invention provides a guide vane air valve and a flow adjusting device, and relates to the technical field of flow adjustment. The guide vane air valve comprises a valve seat, a blocking piece and a plurality of guide vanes. The valve seat is provided with a containing cavity. The multiple guide blades are located in the containing cavity and distributed in a radial shape. One end of the guide vane is rotationally matched with the inner wall of the accommodating cavity; the blocking piece is fixedly connected with the end, away from the inner wall of the containing cavity, of one guide blade and can be rotationally matched with the ends, away from the inner wall of the containing cavity, of the remaining guide blades. When the multiple guide blades rotate to a preset angle, the ends, away from the inner wall of the containing cavity, of the remaining guide blades can be attached to the blocking piece, so that the multiple guide blades and the blocking piece are matched to separate the containing cavity. Th