The utility model discloses a ventilation cooling mechanism, including the heat dissipation room, the heat dissipation room has the installation and holds chamber and at least one ventilation hole, the piece of airing exhaust, air exhaust the piece set up in the heat dissipation on the room and with the chamber intercommunication is held in the installation, one end of the support rack is hinged at the support, the support frame set up in it is indoor to dispel the heat, and at least one wind guide, wind guide set up in on the support frame, just wind guide has into wind gap and air outlet, go into the wind gap with ventilation hole intercommunication, the air outlet is located the intracavity is held in the installation. So can get into wind guide from going into the wind gap by the air so that dispel the heat outdoorly, it is indoor to the heat dissipation to flow out from the air outlet, and later the rethread is aired exhaust the heat that produces inside plant work and is in time discharged, the efficient cycle who so forms the air flows for ventilation cooling mechanism's radiating effect is good, avoids the inside plant to be in high temperature environment work down for a long time, guarantees normal work and long service life, eliminates latent potential safety hazard.