The invention provides a preparation method of an attapulgite-loaded nanometre iron material. Acidized and modified attapulgite is taken as a load material, and KBH4, NaBH4, N2H4 and the like are taken as reducing agent under the protection of inert gases, so that ferric salt or ferrite can be reduced to be zero-valent iron; and the multi-duct characteristic of the attapulgite is utilized, so that nanometre iron particles are sufficiently dispersed and fixedly loaded on the attapulgite material. Compared with un-loaded nanometre iron, the attapulgite-loaded nanometre iron material prepared by the preparation method has better dispersibility and stability, is more uniform in particle size distribution, not easy to cause particle agglomeration and self-oxidization; and moreover, the attapulgite-loaded nanometre iron material has better suspension property and stability in aqueous solution, a stronger oxidative degradation ability to environmental pollutants, longer effective reaction time, and a better adsorption capacity. The material is expected to be extensively applied to environment pollution abatement and repair engineering, and fills a blank in the filed at home and abroad.