The temperature field and residual stress field of medium-high carbon steel during following cooling after hard-facewelding(hardfacing) were measured by a thermo-vision analyzer and a X-ray stress analyzer separately. By using the experimental data and the thermo-physical, mechanical parameters of materials, the temperature and stress fields model of FEM were established. According to this model, the stress of medium-high carbon steel during cooling after hardfacing was analyzed in this paper. The results show that the calculated temperature and residual stress fields fit the measured ones very well and it is good enough to simulate the stress during cooling after hardfacing in different regions of the specimen. When the martensite transformation occurs at the HAZ and hardfacing metal, the compressive stress appears at the surface of the specimen. With the further decreasing of temperature, the tensile stress appears in this region and it increases gradually.