The invention belongs to the field of high-value utilization of biomass resources and especially relates to an attapulgite-biomass activated carbon soil restoration material and a preparation method thereof. According to the preparation method, attapulgite and rapeseed oil residue which are used as raw materials firstly undergo one-step high-temperature pyrolysis to prepare an attapulgite/carbon composite material; and then the attapulgite/carbon composite material undergoes acid activation treatment to prepare an attapulgite/activated carbon composite material.