Fuente: WIPO "circular economy" The present invention provides a method, and device for the separation and recovery of heavy metal ions by membrane-forming mineralization fixation, which belongs to the field of acid wastewater treatment technology containing heavy metal ions, comprises the following steps: mixing the composite mineral particles with the heavy metal acidic wastewater, performing a first hydration reaction under a standing condition, and performing adsorption-precipitation-crystallization on the heavy metal ions in the heavy metal acidic wastewater by the obtained colloidal liquid membrane to obtain particles with an outer layer having a mineralized membrane; the particles having a mineralized membrane in the outer layer have a spacing between the mineralized membrane and the particles; separating the particles having a mineralized membrane in the outer layer, and then respectively recovering the same; the process for the preparation method of the composite mineral particles comprises the following steps: mixing sodium carbonate/sodium silicate, bentonite, carbide slag and water, performing a second hydration reaction, and then successively performing granulation, aging, and dehydration condensation to obtain composite mineral particles; the particle size of the bentonite and carbide slag are independently ≤74 μm. The present invention can realize the separation and recovery of heavy metal ions by membrane-forming mineralization fixation and waste control by waste.