Abstract: A novel umbrella structure, comprises mainly a shaft, two surface frames, and two connecting parts; wherein, the connecting parts are formed basically by crossing two ribs with each other, and linking them with an main notch and a main runner provided on the shaft and with an sub-notch and sub-runner provided on the surface frames, such that each surface frame can be linked on both symmetrical sides of the shaft, respectively, by the connecting part. As the main runner provided as a sleeve around the shaft slides up and down, the sub-runner on the surface frame will be driven by the connecting parts and slide up and down correspondingly, and its distance to the sub-notch is exactly equal to the distance from the main runner to the main notch and thereby, the umbrella surface can be completely spread out.