Abstract: Hydrological connectivity provids a possible way forward to underestand runoff process and mechnisam, which is valuable for soil erosil controling and sustainable watershed management. The research aims to characterize the slope hydrological connectivity when acconuting for infiltration process, and to investigate the impacts of both slope and rainfall intensity on hydrological connectivity development. On the basis of rainfall simulation experiment, we analyzed hydrological connectivity of a simulated slope (size: 150cm×50cm) with various degree (5°,15°, and 25°) and rainfall intensities (25mm/h, 50mm/h, 70mm/h, and 86mm/h) by using a structural indicator (Flowlength,l_F) and a functional indicator (relative surface connection function, F_RC), respectively. The results suggested that hydrological connection of the surface is mainly composed of short flow paths, l_F of 0-100 mm accounting for as high as 90%, whilst l_F of 100-500 mm accounting for 3% to 8%. The development of hydrological connectivity is mainly confined to the initial stage of the events, whilst it is difficult to further develop once the infiltration rate is equal to the surface storage rate, and the ratio of surface connected is stablized at a certain range value in the late stage. The increase in slope generally facilitate the development of hydrological connectivity. The ratio of surface connected on 5 degree-slope is generally lower than the others. Due to the increase in surface roughness, the development of hydrological connectivity is limited when the rainfall intensity is increased to a certain degree, which partly explain the insignificant change in hydrological connectivity under the rainfall intensity of between 50 mm/h, 70 mm/h, and 86 mm/h.