The invention relates to a preparation method of an alumina hollow fibre membrane containing an inorganic additive, which comprises the following four steps of: preparing an organic solution; preparing an organic solution-inorganic granule system; preparing an alumina hollow fibre blank body containing the inorganic additive; and preparing the alumina hollow fibre membrane containing the inorganic additive, wherein a film casting solution contains the inorganic additive; and the inorganic additive is a mixture containing one or more than two of aluminium metal powder, silica, titanium dioxide, zirconium dioxide, kaolin, montmorillonoid, kieselguhr, talc and silicate. The preparation method disclosed by the invention has the advantages that: the technology is mature, the process is simpler, equipment and technology cost is saved, the alumina content and the sintering temperature are reduced, the cost of the alumina hollow fibre membrane is reduced, and the characteristics of high packing density, high strength, uniformity of pore size distribution, and the like are achieved; and viewed from two aspects of material cost and energy consumption, the cost of the alumina hollow fibre membrane is greatly reduced.