The invention discloses a sun umbrella for sun shading, and relates to the technical field of sun umbrellas. The sun umbrella comprises a sunshade, wherein a rib of the sunshade is provided with a housing, a storage battery is fixedly arranged on one side of the inner wall of the housing, a blower mechanism is arranged in the housing, a connecting plate is connected to the rear side of the inner cavity of the housing, a slide plate is connected to the inside of the housing, a magnetic clamping mechanism is arranged on one side of the slide plate, the rear side of the housing is connected witha half ring, one side of the half ring is provided with a clamping rod, one end of the clamping rod is in slidable arrangement with one side of the slide plate, non-slip washers are bonded to the inner sides of the clamping rod and the half ring, and one side of each of the two non-slip washers is clamped with the outer ring of the sunshade. By arranging the blower mechanism, blowing wind providespeople with a cool and comfortable environment, moreover, by cooperating with the magnetic clamping mechanism, the disassembly and assembly of the housing on a sunshade frame are facilitated, a dualeffect is realized and better services are provided to people.