The electric door closer for fire doors consists of a door closer groove, connecting rod, and mechanical door closer, installed on the back fire surface of normally open fire doors. After installing this device and powering on the fire door, it can maintain the open state of the pushed open fire door. In the event of a fire alarm, the monitoring equipment will issue an emergency door closing command, and the door closer will automatically close the door after receiving the power, becoming a movable fire partition that can be manually pushed open and closed by itself.