The invention relates to an umbrella tool capable of emitting light. A plurality of light sources are arranged on a sliding sleeve; when the sliding sleeve moves along an umbrella pole until the sliding sleeve is supported against a positioning clamping tenon arranged on the umbrella pole, the positioning clamping tenon keeps electric contact with a conductive strip of the sliding sleeve after one umbrella cover is pushed and stretched to unfold, so that the light source of the sliding sleeve can be conductive with a power supplying device arranged on a grip handle through the conductive strip and the positioning tenon to provide light and effectively remind a driver of noticing and really improve the walking safety of a user.