The invention discloses an inflatable sunshade umbrella, which comprises an umbrella handle part, a sliding push cylinder in sliding fit and connection with an inner wall of the umbrella handle part, an umbrella cover connecting piece rotatably connected to the upper part of the umbrella handle part, and inflatable support pipes connected onto the umbrella cover connecting piece. The umbrella cover is connected onto the inflatable support pipes; a piston is in threaded connection onto the sliding push cylinder; an invert tapered inclined plane c is formed on the lower part of a side wall of the piston; a rubber ring sleeves the outer side of the inclined plance c; a drive ring is formed in the periphery of the upper end of the sliding push cylinder; two symmetrically arranged one-way valves are fixedly arranged on the upper end of the umbrella handle part, and comprise an externally conductive one-way valve a in the umbrella handle part, and a one-way valve b opposite to a conducting direction of the one-way valve a; an air breather a with the upper end communicating with an umbrella stand joint and the lower end pressing against one one-way valve in a sealing way is formed in the umbrella cover connecting piece; and a magnet a and a magnet b are fixedly connected to a middle position of a one-way valve installation base and a middle position on a gas control part.