The invention discloses a temperature measuring resistor with low possibility of temperature value jump. The temperature measuring resistor comprises a temperature measurement probe, the circumferenceof the front end of the temperature measurement probe is provided with forward threads, the circumference of the back end of the temperature measurement probe is provided with counter threads whose diameter is greater than that of the forward threads, an annular groove is arranged between the forward threads and the counter threads, the pitch of the forward threads equals that of the counter threads, the width of the annular groove is greater than the length of the forward threads, the temperature measurement probe is connected with a signal cable via a cable connector, the signal cable is composed of two signal lines, and the cable connector comprises an aviation plug connected with the temperature measurement probe and an aviation socket connected with the signal cable. The temperaturemeasuring resistor has the advantages that the detected temperature value tends not to jump, shutdown due to misoperation of a hydropower station set tends not to occur, a lot of detection and maintenance can be omitted, and the economic benefit of a hydropower station is increased.