The invention discloses an indirect heating type testing method of high temperature resistance of carbon/carbon heaters, comprising the following steps: 1. fixing a graphite heater on a lead electrode in a resistance furnace; 2. fixing one or more carbon/carbon heaters around the graphite heater; 3. connecting a group of positive and negative lead electrodes II which are led from the inside of the furnace to the outside of the furnace at two ends of the carbon/carbon heaters respectively; 4. correspondingly clamping measuring clamps of a Kelvin bridge on a group of positive and negative lead electrodes II; 5. introducing protective gases into the resistance furnace; 6. indirectly heating the carbon/carbon heaters by heating the graphite heater by electrifying, keeping recording the temperature of the carbon/carbon heaters and the resistance between the positive and negative lead electrodes II during heating and drawing the resistance change rate curves of the carbon/carbon heaters from normal temperature to high temperature, wherein, the resistance is measured by the corresponding Kelvin bridge. To sum up, the method of the invention is simple in steps, easy in operation and good in testing effects, can simultaneously test the high temperature resistance of a plurality of carbon/carbon heaters and is convenient for comparative analysis.