The utility model relates to an intelligent vehicle-mounted oilfield produced liquid in-situ treatment reinjection control system. The system comprises an intelligent control unit, and an air floatation oil separation device, a filtration oil removal device, an ion regulation and control device, a corrosion and scale inhibition adjustment device, a sterilization device and a water injection clearwater tank which are connected in sequence, wherein the air floatation oil separation device, the filtration oil removal device, the ion regulation and control device and the corrosion and scale inhibition regulation device are respectively connected with the intelligent control unit, and the control systems except the water injection clear water tank are all integrated in a standard container. According to the utility model, the treatment and reinjection of the oilfield produced liquid are realized, the discharge of the oilfield produced liquid is reduced to a certain extent, the environmental hazard is reduced, the fresh water consumption is reduced, and the water resource is saved.