The overall goal of the temperature measurement and control technology of partial hyperthermia therapy for malignant tumors is to achieve two goals: first, to conformal the cancer body temperature to a reasonable treatment temperature, and maintain a period of time, so that the cancer cells and their diseases suffer indelible severe blows; On the other hand, it is also necessary to maintain the overheating damage of all normal structures, and try to avoid all kinds of trauma and life-threatening symptoms that patients cannot bear in the treatment. If hyperthermia wants to achieve the above two points, the temperature measurement accuracy and practicability must be good in distributed fiber optic temperature monitoring. The precision of dts fiber temperature measurement is generally specified in the region, so the real-time and accurate detection of malignant tumor location temperature plays a very key role in the malignant tumor hyperthermia technology. It consists of two levels: temperature test in hyperthermia zone and temperature control in hyperthermia zone.