Wireless warning doorbell

The invention relates to a wireless warning doorbell which is composed of a doorbell body, a receiving control module, a loudspeaker, a reed pipe, a battery, a remote controller and a magnet. The magnet is installed on a door frame, and the reed pipe is installed on a door to be right opposite to the magnet. The receiving control module, the loudspeaker, the reed pipe and the battery in the doorbell are communicated through a wire to form a loop. According to the wireless warning doorbell, whether the door is closed or not can be sensed through the mutual positions of the reed pipe installed on the door and the magnet installed on the door frame. The wireless warning doorbell has the advantages that the structure is simple, the cost is low, and a user will not forget to close the door.