Civil air defense construction ventilation structure

The utility model provides a ventilation structure for civil air defense engineering, which belongs to the technical field of civil air defense engineering and comprises an air inlet filter component, an air inlet component, an air exhaust filter component and an air exhaust component. The air inlet filtering assembly comprises a plurality of air inlet filtering sub-assemblies arranged on one side in the civil air defense project from bottom to top, the air inlet assembly is connected with the air inlet filtering sub-assembly at the lowest vertical position, and the air exhaust filtering assembly comprises a plurality of air exhaust filtering sub-assemblies arranged on the other side in the civil air defense project from bottom to top. Filter holes of all the exhaust filter sub-assemblies become smaller and smaller from bottom to top; the air exhaust assembly is connected with the air inlet filtering sub-assembly with the highest vertical position in all the air exhaust filtering sub-assemblies so that indoor