The invention relates to the field of heat treatment of iron and steel materials, particularly to a heat treatment method for accelerating the aging of a T/P92 heat-resistant steel. The method comprises: carrying out rapid high-temperature short-term aging accelerating on a substrate and a carbide, and ageing at a temperature of 30-40 DEG C below the AC1 point; carrying out secondary ageing at a temperature of 650 DEG C after completing the aging to ensure the rapid precipitation of the Laves phase, such that the aging structure equivalent to the actual working condition at different stages isachieved. According to the present invention, with the aging accelerating method, different degrees of the aging structures of the T/P92 heat-resistant steel can be rapidly obtained, and the aging structure in the actual working condition of the T/P92 heat-resistant steel can be accurately, reliably and equivalently simulated, such that technical problem that different degrees of the aging structures during the whole use stage cannot be obtained due to the short service time of the T/P92 heat-resistant steel so as not to perform the effective aging grade evaluation in the prior art can be solved.