This standard specifies the test method for flaking resistance of thermal insulation refractory bricks, including terms and definitions, test principles, required instrumentation and equipment, selection and preparation of samples, test procedures, calculation and processing of results, and preparation of test reports. The test is carried out under specified conditions, using air as the chilling down medium. After the sudden heat and cold temperature change, the mass loss rate of the sample before and after the test is determined to evaluate the flaking resistance of thermal insulation refractory bricks. This standard is applicable to evaluate the flaking resistance of thermal insulation refractory bricks in actual use, to ensure its Stability and Reliability in high temperature environments.