This disclosure relates to an apparatus and a method for strengthening a glass cover, wherein the methods comprises the steps of providing baffles which are used to connect glass covers to be strengthened so as to constitute a annular structure; injecting a strengthening liquid into one side of the annular structure to form a strengthening liquid potential energy difference between two sides of the annular structure; and allowing the strengthening liquid to flow between two sides of the baffle so as to etch the glass covers.