The invention discloses a heat treatment method for a double-layer steel pipe. The double-layer steel pipe is a metallurgical bonded seamless steel pipe, the outer layer of the double-layer steel pipe is made of low carbon steel or low carbon alloy steel, and the inner layer of the double-layer steel pipe is made of high carbon and chromium bearing steel. The heat treatment method comprises the following steps of: plugging two ends of the steel pipe by using plugs, heating at a temperature which is 30 to 50 DEG C higher than the austenitizing temperature Ac1 of the high carbon and chromium bearing steel, preserving the heat, discharging the steel pipe of which the two ends are provided with the plugs, uniformly cooling the outer surface of the steel pipe by spraying water, and removing the plugs at the two ends of the steel pipe for tempering. By the method, decarburizing oxidation of the inner wall of the steel pipe can be prevented, the abrasion resistance of the steel pipe is ensured, and quenching cracks are prevented from being produced on the inner wall of the steel pipe.