The invention provides a refrigerator and a drawer thereof. The drawer is used for being mounted in a storage room of the refrigerator and comprises a drawer body and a louver window, wherein a storage space is limited in the drawer body; one side of the drawer body is opened to form a ventilation window through which cold air of the refrigerator can enter the drawer body; the louver window is mounted at the ventilation window and is provided with a plurality of louver blades arranged in parallel; and the plurality of louver blades can be pivotally rotated to change the ventilation area of the ventilation window.