The invention relates to a high-temperature stretching testing method for flame-resistant fiber cloth. The method comprises the following steps of: (1) sampling according to a test requirement and coating flexibility-strengthened paint on the end heads at the both ends of a sample; (II) after the coating is condensed, using a clamp to fix the both ends of the test sample in a stretching tester; (III) uniformly heating a section to be stretched of the heating sample in a contact type heating manner to; when a testing temperature is reached, turning on the stretching tester to tract the both ends of the test sample at constant speed, stopping stretching until a load of the test sample meets the test requirement, and recording test data; and (IV) for the same sample to be tested, repeating the steps (I)-(III) and processing effective experimental data. The invention further provides special heating equipment for realizing the method. According to the high-temperature stretching testing method provided by the invention, the contact type heating method is adopted to only heat the section to be stretched of the sample, so that not only can the temperature of the section to be stretched of the sample be accurately controlled, but also the end heads of the sample are not heated. Therefore, the flexibility-strengthened paint at the end heads of the sample can be prevented from losing efficiency at a high temperature.