Cold and hot fatigue testing machine

The utility model discloses a cold and hot fatigue testing machine, and relates to the technical field of fatigue testing devices, in particular to a cold and hot fatigue testing machine which comprises a testing machine body and a water tank, a pointer type thermometer and a fixing block are installed on one side face of the testing machine body, and a pointer rod is arranged in the pointer type thermometer. The inner surface of the pointer type thermometer is provided with a matching plate, and the top of the matching plate is provided with a reset spring and a contact switch. According to the cold and hot fatigue testing machine, a pointer type thermometer, a pointer rod, a matching plate, a reset spring, a contact switch, an adjusting plate, a feeler lever and a temperature bulb are arranged, so that the cold and hot fatigue testing machine has the effect of conveniently reminding a worker when the temperature in the heating cavity is too high or too low, and in the using process, when the temperature is