Abstract: A mechanism and method for easily replacing a zipper of a zippered hardside luggage, wherein one side of a zipper is fixed to an upper case body by an upper zipper fastener, and the other side of the zipper is fixed to a lower case body by a lower zipper fastener; the upper zipper fastener and the lower zipper fastener have a respective notch; a removable notch fastener is arranged at the joint between the upper case body and the lower case body at the notch; and the replacement method comprises: firstly removing the notch fastener, pulling out the old zipper from the notches of the upper zipper fastener and the lower zipper fastener, then passing a new zipper through the notches of the upper zipper fastener and the lower zipper fastener, and finally mounting the notch fastener.