Abstract: A structure for adjusting the tightness of a shoe comprises: a shoe, a shoelace, and a plurality of fixing hooks. A plurality of inserting holes is formed at both end of the U-shaped gap of the shoe for insertion of the shoelace. The shoelace is formed with a plurality of fixing holes, and the fixing hooks are to be hooked in the fixing holes. A method for adjusting the tightness of a shoe comprises: inserting the shoelace through the inserting holes at the starting section and the fishing section, adjusting the degree of tightness of the starting and finishing sections of the shoelace, and fixing the hook in any of the fixing holes at the mid section to obtain a comfortable tightness at the mid section of the shoe.