Cold air entering and purifying device for negative pressure protection end of normal pressure sterilization cabinet

The utility model discloses a normal pressure sterilization cabinet negative pressure protection end cold air entering and purifying device which comprises a sterilization cabinet mechanism, a mounting box mechanism, a purifying mechanism, a moving mechanism and a mounting box mechanism, the mounting box mechanism comprises a box body arranged on the left side of a cabinet body, an air inlet pipe is arranged on the lower side of the outer wall of the left side of the box body, and a fan is arranged in an inner cavity of the box body; the purifying box is arranged in the inner cavity of the box body and located at the front end of the fan, and a heating pipe is arranged at the bottom of the inner cavity of the purifying box; the purification mechanism comprises a first filter plate and a second filter plate which are arranged in an inner cavity of the purification box and distributed at equal intervals in the left-right direction, and mounting grooves corresponding to the first filter plate and the second filt