Abstract: On June 10, 2021, a sudden rainstorm triggered 701 shallow landslides in Zhuji City, Zhejiang Province. Based on field investigation and laboratory soil tests, a new flume test system has been developed, which can simultaneously monitor multiple parameters such as slope seepage flow, runoff flow, displacement, and pore water pressure. An artificial rainfall test was conducted to analyze the hydrological response and deformation response of the model slope under the rainstorm. The initiation mechanism of the coupling effect between slope hydrological response and deformation response was discussed. The results show that after the rainfall began, slope deformation, seepage flow, soil pore water pressure, and volumetric moisture content increased first and then remained in a stable stage. The model slope could be kept stable under rainfall of relatively lower intensity. However, as the rainfall further increased, the amount of rainwater infiltration gradually exceeded the amount of drainage of the slope, and the amount of water accumulated in the slope continued to increase, causing slow creep in the slope. Creep deformation gradually destroyed the original seepage channels, causing the slope's seepage and drainage capacity to decrease sharply, which will further accelerate the accumulation of water within the slope. The hydrological response of the slope was coupled with creep deformation that would ultimately lead to the failure of the model slope. The monitoring data from the experiments shows that when landslides occur, soil pore water pressure surges near the sliding surface, with the shear strength decreasing, and the soil becomes fluidized, resulting in violent and rapid slope sliding.