A plastic bag hanger for garbage bin comprises an elastic clip (1) and a hanging lug (2) that are connected to each other. The elastic clip is clamped at an edge of the garbage bin. Irrespective of whether the plastic bag is big or small, a top edge or lifting handles of the plastic bag can be wound around the hanging lug. Because the hanger is fixedly secured to the garbage bin, the plastic bag filled with garbage is not easy to drop into the garbage bin even when it is relatively small; if the plastic bag is relatively big, the edge of the plastic bag exposed outside can be wound around the hanging lug more still without influence on aesthetics. Before the plastic bag in the garbage bin is filled with the garbage, it can not be easily blown away by wind as the hanger is secured to the garbage bin. If a plastic waistcoat-shaped bag is used as the garbage bag, lifting handles of the waistcoat-shaped bag can be wholly wound around the hanging lug of the hanger without influence on aesthetics. A garbage bin provided with the plastic bag hanger is also disclosed.