In the steady-state method for measuring thermal conductivity coeficient of poor conductors , theinfluence of increasing the temperature of heating plate, decreasing the ambient temperature and closing thecooling fan on key experimental parameters , measurement error and experimental duration were studied.Theresults show that the experimental conditions had significant influence on the steady-state temperature of thecooling plate( T,) and the cooling rate of the cooling plate at 7,,and the systematic error of the experiment wasalso affected.Increasing the temperature of heating plate or decreasing the ambient temperature could effectivelyshorten the experiment duration with little influence on measurement error.Turning off the cooling fan couldreduce the experimental system error introduced by area correction, but the experimental duration wasprolonged.