The invention discloses a buried gas pipeline leakage point location detection method based on Beidou positioning. The method comprises the following steps that step 1, the coverage range of buried gas pipeline leakage detection is defined; step 2, tracer gas is injected into an upstream gas pipeline injection port of the coverage range; step 3, first detection holes are drilled along the pipeline within the coverage; step 4, the concentration of the tracer gas in each first detection hole is detected; step 5, the position of a suspected leakage point is reckoned; step 6, second detection holes are drilled along the pipeline around the suspected leakage point; step 7, the concentration of the tracer gas in each second detection hole is detected; step 8, the coordinates of each second detection hole are acquired by using a Beidou positioning method; and step 9, the position of the leakage point is finally located according to the concentration change law of the tracer gas and the coordinates of the detection holes. Compared with the methods in the prior art, the method has the obvious advantages of being high in location accuracy, high in anti-interference capability and low in damage to the ground.