The invention provides a supercritical water particulate matter visual measurement experimental device and method. The device comprises a preheating section for primarily heating fluid in a pipeline,a heating section for secondarily heating the fluid in the pipeline, a visual section for observing particulate matters, a cooling section for cooling the fluid in the pipeline, a pressure stabilizingsection for adjusting the pressure of a loop and a feeding section for adding water and particulate matters into the loop. The experimental device can study the flowing condition of fluid in the pipeline and the deposition movement condition of particulate impurities in the fluid in a visual measurement mode, is visual in observation, can accurately and effectively measure related data, and meetsexperimental requirements and engineering application.