The invention relates to the field of shoe brushes, and in particular relates to a portable shoe brush. The portable shoe brush comprises a brush body, wherein the brush body is of a cylinder-shaped structure, a bristle-free area and a bristle area are arranged on the periphery of the brush body, a rotation shaft penetrates through the center of the brush body, a cylinder-shaped shell sleeves the outer part of the brush body, the shell is rotatably connected to the rotation shaft through bearings at two ends, a horizontal opening is formed in the circumferential surface of the shell, lower clamping grooves are arranged at two sides of the opening, an arc-shaped clamping cover corresponding to the opening is further arranged, two sides of the clamping cover are provided with clamping heads matched with the lower clamping grooves, and the clamping cover seals the opening through the match between the clamping heads and the lower clamping grooves. According to the portable shoe brush, the bristles are not exposed to the outside, so that the storage and carrying of the shoe brush are greatly facilitated.