The size and distribution regularities of flow dead zone of shutter baffle heat exchanger were researched by numerical simulation and experiment. It is concluded that the size of flow dead zone in shell side of shutter baffle heat exchanger is reduced with increase of Reynolds number. The size and distribution of flow dead zone are affected by assemble types of shutter baffles. When the shutter baffle is co-rotating arranged

the size of dead zone in shell side was less than that of symmetrical. When Re=5000

Re=10000 and Re=15000

the dead zone in shell side of shutter baffle heat exchanger with shutter baffle co-rotating arrangement are respectively 50.5%、51.6%、43.0% of that with shutter baffle symmetrical arrangement.