The present application discloses a collapsible organizer of the present application comprises a base, a pair of side walls and a pair of top rods. The pair of side walls is rotatably coupled to the base, wherein each of the side walls comprises a pair of slots. Each of the top rods comprises a straight portion and a pair of insertions coupled to two ends of the straight portion correspondingly, one of the insertions is insertably coupled to one of the slots of one of the side walls, another one of the insertions is insertably coupled to one of the slots of another one of the side walls. A method for utilizing the aforementioned collapsible organizer is also disclosed, comprising: rotating the pair of the side walls; and inserting the pair of top rods to the slots of the pair of side walls.