Reservoir level monitoring and alarming device

The utility model relates to the technical field of water level monitoring and alarming devices, in particular to a reservoir water level monitoring and alarming device which comprises a monitoring pipe, a base rod is arranged at the bottom of the monitoring pipe, an adjusting rod is sleeved with the base rod in a threaded mode, and the end, extending out of the base rod, of the adjusting rod is installed at the bottom of the monitoring pipe. A plurality of first water permeable holes are evenly formed in the bottom of the monitoring pipe in the circumferential direction, an ultrasonic liquid level sensor is installed on the inner wall of the top of the monitoring pipe, a protection box is installed on the top of the monitoring pipe, an alarm lamp is installed on the top of the protection box, and a storage battery and a PLC are arranged in the protection box. The storage battery and the PLC are electrically connected with the ultrasonic liquid level sensor, the reinforcing mechanism comprises an adjusting ri