The invention relates to an auxiliary tool for cleaning a switch cabinet. The auxiliary tool comprises an insulation brush (1), a video illumination device (2), a dust collector (3), an electric dust collector (4), a hot air scavenging device (5), a universal joint (6), a grip (7), a plastic pipeline (8), a dust collecting bag (9) and a video display device (10). The insulation brush (1), the video illumination device (2), the dust collector (3), the electric dust collector (4) and the hot air scavenging device (5) form a cleanup terminal which can carry out dust collecting and cleaning on components and devices, flowing dust pollution is avoided, components and devices on the inner side and at dead corners in the switch cabinet can be accurately positioned especially, the cleanliness is high, and the whole tool is convenient to carry and operate, high in endurance capability and good in cleaning effect.