Novel oral cavity protective mask

The utility model discloses a novel oral cavity protective mask which comprises a head fixing clamp, the outer surface of the head fixing clamp is fixedly connected with a connecting base, the outer surface of a replaceable rolling film is fixedly connected with a rotating device, and a fixing device is arranged outside the rotating device. According to the device, a rotating device is arranged, a pull ring and a pull-back rope on the rotating device are pulled to drive a ratchet wheel to rotate, the ratchet wheel drives a rotating shaft to rotate, the rotating shaft drives a replaceable roll film on a sliding rod to rotate, and two rotating film bases are connected into a whole through the replaceable roll film, so that the replaceable roll film slides in the walls of groove holes of the rotating film bases on the two sides; the replaceable roll film can be replaced in time, pollutants on the mask can be removed in time, the sight blocking problem can be solved, droplet spreading can be prevented, doctors an