The invention discloses acidified attapulgite clay, and the key points of the technical scheme are that: the acidified attapulgite clay comprises the ingredients of attapulgite clay, sulfuric acid, instant sodium silicate, polyvinyl alcohol, hydroxypropyl methyl cellulose and sodium carbonate. A production method of the acidified attapulgite clay is as follows: acidified attapulgite clay ingredients are transported into a mill for milling powder, and the milled powder is the acidified attapulgite clay. Acidification treatment can remove impurities distributed in attapulgite clay pore channels, the pore channels are dredged, and the pore volume is increased. The acidified attapulgite clay can improve the adsorption property, decolorization rate, catalytic action, specific surface area and porosity of the attapulgite clay, colloid viscosity of the acidified attapulgite clay can be increased and the PH of the acidified attapulgite clay can be adjusted. The acidified attapulgite clay is applicable to the production of products of petroleum, chemical industry, medicines, building materials, plastics and other industry fields.