The utility model relates to a thermostatic dynamic simulation test device for coating fouling test, which comprises a water tank, a pump, a plastic pipe, an organic glass pipe, an input valve, flanges, a flow counter, a detector, a monitoring instrument, a temperature controller, a blender, a heater, a return pipe and a dolly. Fouling-proof effect of coating is evaluated. The utility model has the advantages that usage is simple, testing is accurate, and assess effectiveness is high.