The paper introduces the application of infrared thermo measure technology in the forging of the car’s torsional pole in full ,explains the principle of the infrared thermo measure and the athering ,processing measure of the thermo-message that use the infrared thermo measure ,in the mean time ,the paper illustrates the features of the temperature measure of the steel billet that use the infrared thermo measure principle : non-contact measure ,fast in response speed ,good in consistency of the temperature ,and so on.