The invention discloses a method for calculating earth's air leakage volume in a shallow coal seam working face goaf. The method comprises the steps that (1) before mining, an SF6 tracter gas method is used to measure the air leakage volume in the adjacent goaf, and the air leakage volume is recorded as V; (2) after mining, the mine pressure is monitored, the fracture development on the earth's surface is observed, the pressure is generated periodically, a number of fractures are observed on the earth's surface, the underground and earth's surface pressure intensity is measured, the whole airleakage volume in the goaf under the pressure difference is detected, the whole air leakage volume is recorded as V1, the air leakage volume of the earth's surface is recorded as V1-V, the above stepsof motoring mine pressure, observing the fractures and detecting the air leakage volume are repeated ten times or above, the whole air leakage volume in the goaf is sequentially recorded as V2, V3,..., Vn, and the air leakage volume of the earth's surface is sequentially recorded as V2-V, V3-V, ..., Vn-V; (3) an air leakage volume function of the earth's surface is fitted at the same pressure difference after period fracture each time, and site validation and calibration are carried out. The method for calculating earth's air leakage volume in the shallow coal seam working face goaf is simple, high in reliability, strong in operation, and can be applied to the determination of the air leakage volume of the earth's surface in the mining process of the shallow coal seam in western China.