The utility model provides a take temperature monitoring's dc voltage divider, the device includes: divider resistance, voltage -sharing electric capacity, outer tube, interior epoxy bucket and heat exchanger, interior epoxy bucket is outer air chamber with the region that the overcoat circumference of cannon bone becomes, and the region that interior epoxy bucket encloses is interior air chamber, the device still includes temperature measurement optical fiber and temperature measurement system host computer, temperature measurement optical fiber installs in dc voltage divider on the epoxy bucket outer wall, and temperature measurement optical fiber is with real -time supervision's data transmission to temperature measurement system host computer. Improve single resistor or single capacitor element and open a way the trouble to the judgement of trouble when taking place, improve dc voltage divider's reliability. Personnel know system temperature sum of distribution analysis failure cause even be convenient for.