A method for nanometer attapulgite clay particle surface magnetized modification is characterized in that an attapulgite clay solution with the pH value being 3-10 is prepared, stirred and heated, an FeCl2 solution is added drop by drop at 30-100 DEG C, a KOH or NaOH solution is added drop by drop at the same time for keeping the pH value of the solution, and the temperature for solution reactionkeeps constant; after FeCl2 is added drop by drop, stirring is performed continuously and the temperature is kept for 30-60 minutes at the same time, and then a reaction solution is obtained; the reaction solution is cleaned by ionized water, attapulgite clay particles are obtained after filtration and aired at the room temperature, and the magnetized anometer attapulgite clay particles can be obtained. The invention can be utilized to obtain nanometer attapulgite clay particles with surface magnetic particles on the basis of simple operation.