Building evacuation door opening device

The utility model discloses a building evacuation door opening device which comprises a door frame, a locating pin is connected into the door frame in a sliding mode, the lower end of the locating pinis connected with a pull rod through threads, the right end of the locating pin is connected with a connecting sleeve through threads, and a tie bar is arranged at the right end of the connecting sleeve. Cylindrical iron is designed in the door body; a movable positioning pin is designed in the door frame; the positioning pin is matched with the positioning groove of the door body to close the door body; a stretching reset structure composed of a connecting sleeve made of rubber, a tie bar and a connecting block is designed at the right end of the positioning pin, so that the positioning pinis reset. According to the principle that the cylindrical iron is powered on to generate attraction to attract the positioning pin, the door body is closed, when a fire occurs, the power source is closed, the magnetic force of