Abstract: In the report, aimed at the problems about the monitoring theory and technology of the hydraulic slopes failure under cyclone rainfall, a physical model test on the stability monitoring of weathering transition zone in hydraulic slopes was carried out. The results indicated that the surface erosion was caused by water-air interaction under cyclone rainfall, and the groundwater pressure fluctuation in the strong-weak weathering transition zone was the main cause of slope deformation. The pore water pressure of the slope weathering transition zone was positively correlated with rainfall intensity during rainfall infiltration, while the axial force loss of rock bolts in the weathering transition zone was intensified. The unloading response of the Intelligent Terminal Structure of the slope anchoring system was significant during the period of groundwater pressure fluctuation. Moreover, based on the nonlinear relationship between the axial force of the rock bolt and the pore water pressure, the stability monitoring criterion of weathered transition zone was proposed.