Recycling treatment system and method for fracturing flow-back fluid

The invention discloses a recycling treatment system for fracturing flow-back fluid. The recycling treatment system comprises a solid-liquid separation device, a liquid-liquid separation device and a liquid-liquid separation device, the first electrochemical reaction tank is positioned at the rear end of the solid-liquid separation device and is used for carrying out first electrochemical reaction treatment on the flowback liquid to reduce viscosity and remove calcium and magnesium ions in the flowback liquid; the second electrochemical reaction tank is positioned at the rear end of the first electrochemical reaction tank and is used for carrying out secondary electrochemical reaction treatment on the flowback liquid to remove suspended matters and oil components in the liquid; the clarification tank is positioned at the rear end of the second electrochemical reaction tank; and the filtering device is used for performing fine filtering treatment on the clarified sewage to obtain flowback liquid meeting the re