The invention relates to a clothing treatment device and a skeleton structure thereof. The clothing treatment device comprises a support frame, a first clothing treatment bucket and a second clothingtreatment bucket are arranged in the support frame in an up-down setting manner, an upper bucket base is arranged between the first clothing treatment bucket and the second clothing treatment bucket,and the upper bucket base is fixed and installed with the supporting frame of the clothing treatment device. The horizontally-arranged upper bucket base is fixedly installed in the middle of the support frame, and the two upper and lower clothing treatment buckets of the clothing treatment device are respectively installed on different bases correspondingly, so that the clothing treatment bucketscan be assuredly effectively supported respectively and fixedly installed; the clothing treatment device is simple in structure, remarkable in effect and suitable for popularization and use.