High-low-temperature alarm system for mould temperature controller

The invention discloses a high-low-temperature alarm system for a mould temperature controller. The high-low-temperature alarm system comprises a temperature measuring device, a temperature controllerand an alarm circuit, wherein the temperature measuring device can measure the temperature of a mould in real time; the input end of the temperature controller is connected to the temperature measuring device, and the output end is provided with a high temperature alarm signal output point and a low temperature alarm signal output point; the high temperature alarm signal output point and the lowtemperature alarm signal output point are separately connected to a first middle relay and a second middle relay; an alarm is connected in the alarm circuit; a normally open contact of the first middle relay and a normally open contact of the second middle relay have access to the alarm circuit in parallel; during working, the temperature controller compares a temperature value input by the temperature measuring device wit