Radioactive wastewater treatment system and mobile radioactive wastewater treatment device

The invention relates to a radioactive wastewater treatment system and a movable radioactive wastewater treatment device. The system comprises a pretreatment device; the ultrafiltration device comprises at least one group of ultrafiltration mechanisms, each ultrafiltration mechanism comprises two ultrafiltration assemblies, a water inlet of each ultrafiltration assembly is connected with a water inlet pipeline and a water return pipeline in parallel, the water inlet pipelines of the two ultrafiltration assemblies are communicated with the water outlet of the pretreatment device, and the water outlets of the two ultrafiltration assemblies are connected with water outlet pipelines; the two water outlet pipelines are connected to a water outlet main pipe, the water inlet pipeline and the water return pipeline are each provided with a first control valve, and the water outlet main pipe is provided with a second control valve. The reverse osmosis device is connected to the water outlet end of the water outlet main