The invention belongs to the technical field of corrosion testing of runner blades of generators of hydropower stations and relates to an experimental device and a test method for simulating pitting corrosion of stainless steel in a scouring environment. In the whole experimental device, an inlet of a cam pump is connected to a solution tank through a pipeline III, an outlet of the cam pump is connected into a spraying chamber through a pipeline I, a control valve and an electromagnetic flowmeter are arranged on the pipeline I, a nozzle is mounted at one end of the pipeline I, an outlet of thenozzle extends into the spraying chamber, the lower side of the outlet of the nozzle corresponds to a sample in the spraying chamber, the bottom of the sample is connected with an attack angle controller, a reference electrode and a counter electrode are inserted into the spraying chamber, and the reference electrode, the counter electrode and the sample are connected to an electrochemical work station through wires respectively. With the adoption of a spraying type scouring corrosion experimental device, the limitation that a pitting corrosion test of stainless steel can only be performed ina static electrolyte environment at present is broken through, and pitting corrosion performance test of different stainless steel in the dynamic scouring environment is realized.