This system is a comprehensive industrial wastewater treatment test platform with a capacity of 20L / h. It includes pretreatment unit, advanced oxidation unit, biological treatment unit, advanced treatment unit, etc It is characterized by advanced oxidation unit, which can improve the biodegradability of high concentration organic wastewater, including photocatalytic oxidation, Fenton oxidation, wet catalytic oxidation, electrolytic oxidation and other processes, and can select different processes for operation, typical applications such as pharmaceutical wastewater, papermaking wastewater, etc; UASB and SBR are the main biochemical devices, which can be used for wastewater treatment with better biochemical performance, such as starch wastewater and beer wastewater; advanced treatment includes quartz sand filtration, activated carbon adsorption, ion exchange, electrodialysis, microfiltration, ultrafiltration, reverse osmosis, etc., which can remove salts, colloids, etc., and each unit can carry out monomer experiment independently, with high flexibility.