Pneumatic hydraulic tube expander pneumatic is composed by hydraulic system, control system, expanding lumen, expanding rod and other components, which has the advantages of low labor intensity, high production efficiency; expanding quality uniform and reliable; expanding medium without pollution to the expansion pipe joint; residual stress; tube plate heat exchanger can be arbitrary for full thickness expansion; hydraulic expansion can not only ensure the expansion quality, prolong the life of the heat exchanger, but also improves the work efficiency, reduce labor costs. In the overhaul and installation of the heat exchanger, the pneumatic hydraulic tube expander is used to solve the problem of long time and high labor cost.