Water temperature alarm for machinery

The utility model discloses a water temperature alarm for machinery, which mainly solves the problem that a mechanical heat-radiating water tank outdoors in the prior art is easily damaged or cracked by the frost. The water temperature alarm for the machinery comprises a temperature detecting device used for measuring the temperature of the pre-measuring temperature position of the machinery, and a temperature control device processing the measured temperature; the temperature control device is electrically connected with a temperature detecting circuit. With the structure above, the temperature detecting circuit can be directly installed on the pre-measuring temperature position of the machinery; when the temperature measured achieves the predetermined temperature, the temperature control device can process according to the actual demand, such as alarm, discharging, etc., preventing the water tank from being damaged or cracked by the frost.