Fracturing flow-back fluid treatment system

The utility model discloses a fracturing flow-back fluid treatment system. The system comprises a receiving tank, a catalytic oxidation tank, an iron-carbon micro-electrolysis tank, a coagulation reaction tank, a first sedimentation tank, a dissolved air floatation tank, a pretreatment water outlet tank, first ion exchange reaction equipment, a biochemical regulation tank, an AAO biochemical treatment device, a second sedimentation tank, a biochemical water outlet tank, an ozone air floatation reaction device, an ozone vaporization water outlet tank, a buffer tank, a quartz sand filter and an ultrafiltration device, the system comprises a reverse osmosis device, an ultrahigh pressure reverse osmosis device, first ion exchange reaction equipment and an MVR evaporative crystallization device. The system has the advantages that the ion exchange reaction equipment is respectively arranged in front of the AAO biochemical treatment device and the MVR evaporative crystallization device and is used for removing calci