The invention provides a method for locating a buried gas pipeline leakage point based on tracer gas. The method comprises the steps that whether leakage exists in a gas pipeline or not is detected, and if the leakage exists in the gas pipeline, the following operations are carried out, that is, the location of the leakage pipeline is determined, holes are drilled in the determined leakage pipeline in the direction of gas flow, probe holes are labeled and counted, and the background concentration of H2 or He in the pipeline is measured; for a closed static gas pipeline, the following operations are carried out, that is, H2 or He tracer gas is injected into the closed static gas pipeline at a time, and tracer gas concentration is detected and recorded at predetermined intervals; and for a dynamic gas pipeline which does not stop conveying, the following operations are carried out, that is, the H2 or He tracer gas is injected into the dynamic gas pipeline continuously, the tracer gas concentration is continuously detected and recorded, and the location of the leakage point of the pipeline is determined based on the tracer gas concentration recorded in the closed static gas pipeline or the tracer gas concentration recorded in the dynamic gas pipeline.