Classified resource recycling system and method for high-salt heavy metal wastewater

The invention belongs to the technical field of wastewater treatment, and particularly relates to a classified recycling system and method for high-salt heavy metal wastewater, which can be used for treating the high-salt heavy metal wastewater generated in the industrial production process by adopting a heavy metal ion exchanger and a precipitation separator to realize classified recycling of heavy metals. Treating the heavy metal purification solution by adopting a membrane separation device comprising a plurality of membrane assemblies with different pressure grades and different interception capacities to realize separation and recovery of purified water, so as to obtain the purified water and a separation liquid; under the action of an electric field, the separation liquid is treated through an ion exchange membrane to obtain acid and alkali, the recycled heavy metal, purified water, acid and alkali have high utilization value, the high-salt heavy metal wastewater treatment method is simple, secondary po