The invention provides a washable all-solid micro super capacitor and a preparation method thereof and aims at poor wash resistance performance of all-solid micro super capacitor in prior art, and the method comprises following steps: S1, graphene oxide-glutaraldehyde mixed aqueous solution is obtained; S2, a polyethylene terephthalate fabric of which two sides has a graphene oxide layer each is obtained through a dip coating process and serves as a base body of etching; S3, carbon dioxide laser etching is performed on one side of the base body, and a grapheme microelectrode is obtained; S4, the grapheme microelectrode is covered by an enhanced conducting layer; S5, a solid polymer gel electrolyte layer is arranged on the enhanced conducting layer in the S4; and S6, the area surface of the solid polymer gel electrolyte layer is processed through drop coating method to set an glutaraldehyde layer, and the washable all-solid micro super capacitor is obtained. According to the invention, the capacitor has good flexibility, high specific capacity and good wash resistance performance.