Heat exchanging plate set of air pre-heater

The utility model relates to a heat exchanging plate set of an air pre-heater. The heat exchanging plate set comprises a framework (3). Heat exchanging plates (1) are welded on the framework (3) in a stackable mode. Flow-disturbing strips (2) are welded in each heat exchanging plate (1) are in the shapes of waves. The heat exchanging plate set of the air pre-heater has following beneficial effects: due to the fact that the flow-disturbing strips are welded in each heat exchanging plate and are in the shapes of waves so that heat exchange efficiency is high.