Testing system for evolution of slope landslide into debris flow under rainfall action

The invention provides a testing system for evolution of slope landslide into debris flow under rainfall action. The testing system comprises a rainfall plate for rainfall simulation, a water supply unit, a test container and a flushing trench, the test container is used for stacking soil to simulate side slopes, and the flushing trench is used for simulating a debris flow flushing state and internally provided with clay for simulating valleys in different shapes. A plurality of nozzles are distributed on the rainfall plate and communicated with a water output port of the water supply unit. The test container is provided with a container outlet communicated with the flushing trench, and the test container is arranged below the waterfall plate. The system further comprises a parameter detection unit, an image acquisition unit and an upper mainframe, and the parameter detection unit used for test parameter detection and the image acquisition unit for test process image detection are connected with the upper mai