The invention relates to a method for evaluating a heat resistance test of a pavement fiber. The method comprises the following steps: adopting trichloro ethylene for repeatedly filtering a bituminous mixture containing fibers, removing the asphalt coated (absorbed) on the fibers and aggregates by filtering, quickly and centrifugally extracting and separating mineral powder, and then utilizing the characteristic of the fiber capable of being molten into powder under high temperature to burn the two materials of residue aggregate and fiber of the fiber bituminous mixture under high temperature, calculating and acquiring the fiber mass through the weight reduction, comparing with the initially added fiber quantity, calculating high-temperature loss percent and judging the heat resistance thereof. Compared with a present fiber heat resistance test method, the test method provided by the invention has the advantages that the practical production working condition of the bituminous mixture can be simulated, data quantitative and qualitative analysis is adopted for objectively evaluating the existence state of the pavement fiber in the bituminous mixture under the practical production condition and the defects of the traditional method of adopting the subjective standards for evaluating the color, shape, and the like of the fibers under the fixed temperature can be overcome.