The invention relates to a method for removing perchlorates in drinking water and belongs to the technical field of drinking water purifying treatment. The method removes the perchlorates in the drinking water by using an ion exchange principle of inorganic lamellar compounds. The method comprises: a divalent metal compound, a trivalent metal compound and sodium hydroxide are mixed according to a molar mass ratio of 2:1:6 and dissolved directly in deionized water to form a mixed solution; the mixed solution is magnetically stirred at 25 DEG C for 48 hours and then is filtered; and an obtained precipitate is dried at 105 DEG C and ground, and thus lamellar compound powder is obtained. The lamellar compound is filled in a filled column of the prior filtering device as a filtering and absorbing material. After the drinking water containing prechlorates is treated by the filled column, 87 to 97 percent of the prechlorates in the drinking water are removed.