Non-negative pressure water supply equipment with water shortage protection device

The invention relates to the field of non-negative pressure water supply equipment, particularly to non-negative pressure water supply equipment with a water shortage protection device. The non-negative pressure water supply equipment comprises a non-negative pressure tank body and a water pump and further comprises the water shortage protection device, wherein the water shortage protection device comprises a liquid level sensor, a motor, a PLC (Programmable Logic Controller) and a water level probe; one end of the PLC is connected with the liquid level sensor; the other end of the PLC is connected with one end of the motor; the other end of the motor is connected with the water pump; and the water level probe is arranged at the lower part on the left side in the non-negative pressure tank body and is connected with the liquid level sensor through wireless signals. The non-negative pressure water supply equipment can ensure the normal water supply state of the non-negative pressure tank body, greatly reduces manufacturing cost and maintenance cost, and has the advantages of simple structure, reasonable design, low manufacturing cost, convenience in maintenance and longer service life.