Based on calorimetric method,a method to measure the thermal power of chips when cutting nickel-based superalloy at high speed was introduced and the cutting power and the cutting heat in the chips was calculated by measuring cutting force.The effect of cutting parameters on chip power and cutting power,and the distribution of cutting heat were studied too.The simulation results of the cutting heat by Deform-2D agree well with the experimental results.The experimental and calculation results indicate that as cutting speed increases,the chip power and cutting power increase almost linearly;the ratio of cutting heat taken away by chips increases with the increase of cutting speed,but it is much smaller than the ratio in carbon steel cutting;the feed per tooth has a relatively small influence on the distribution of cutting heat.