Based on the principle of steady-state thermal conductivity measurement，an experimental device for measuring the thermal conductivity of ice with heat flow sensor is designed to measure the thermal conductivity of ice．The size of ice used in the experimental device is 13 cm × 8 cm × 1．5 cm(L ×W ×H)，the initial temperature of the ice is 0 ℃，the ice-water mixture of 4 ℃ is used as the stable heat supply end，and the stable cold end of －7 ℃ is obtained with the semiconductor cooler．The conducted heat through the ice is measured by the heat flow sensor，and the temperature difference is measured by the thermocouple．In this experimental device，the measured thermal conductivity of ice is basically stable around 2．00，which is close to the existing experimental results on the thermal conductivity of ice．