Atmospheric water harvesting (AWH) is a promising technology for addressing water scarcity in remote and arid regions. The rational design of advanced adsorbents with high moisture adsorption capacity, rapid adsorption-desorption kinetics, relatively low desorption temperatures, and high desorption rates is crucial for achieving efficient atmospheric water harvesting. Herein, a two-dimensional anionic covalent organic frameworks (COFs) rich in superhydrophilic sites (lithium sulfonate groups) (TpPa-2SO3Li), is reported. TpPa-2SO3Li demonstrates outstanding hygroscopic performance, achieving a remarkable water uptake capacity of 0.74 g center dot g- 1 at 30 %RH and 25 degrees C, with rapid saturation attained in only 150 min. This water uptake capacity exceeds that of currently reported COFs-based materials, and the adsorption-saturated TpPa-2SO3Li can be desorbed at 60 degrees C with a desorption rate of 95.23 % in just 60 min. Furthermore, an outdoor water harvesting device was constructed, achieving a daily water production rate of 3.27 L center dot kg- 1 center dot d- 1 under 50-80 %RH at 15-35 degrees C. This material combines fast adsorption-desorption kinetics with high moisture capacity, enabling efficient daily cycling and excellent stability, potentially providing a promising solution to water scarcity in arid regions.