Pressure relief mechanism for radiation room

The invention discloses a pressure relief mechanism for a radiation room, which comprises a pressure relief main body, the pressure relief main body is mounted in a wall body of the radiation room, an exhaust channel is arranged in the pressure relief main body, and an inlet of the exhaust channel is flush with the inner wall surface of the wall body and is communicated with the radiation room; an outlet of the exhaust channel is used for being flush with the outer wall face of the wall and communicating with outdoor air. The pressure release valve is mounted in the exhaust channel; the blocking assembly is arranged in the exhaust channel and used for blocking direct radiation of radiation rays in the radiation room. Compared with the prior art, the pressure relief main body is not provided with a convex structure relative to the wall body, so that the influence on the service life of the pressure relief mechanism caused by accidental damage to the pressure relief mechanism by indoor or outdoor personnel can