Variable-diameter garbage can

The invention discloses a variable-diameter garbage can which is composed of an inner can and an outer can, wherein the inner can is made of an elastic material; a gap is formed in the upper end of the inner can; a wedge is mounted on the outer side of the inner can; and through changing the up-down position of the inner can in the outer can, the diameter of the garbage can can be changed, and garbage bags of different specifications can be arranged in the garbage can in a sleeving manner. 一种可变口径垃圾桶，是由内筒和外筒组成，由于内筒是由弹性材料制作的，上端开有缺口，外侧装有斜楔，改变内筒在外筒内的上下位置，即可改变垃圾桶的口径，以套装不同规格的垃圾袋。