Preparation method of high-purity natural curcumin product

The invention relates to a natural pigment curcumin product and a production process thereof, and belongs to the technical field of agricultural product deep processing. Turmeric rhizomes are used as raw materials; an eutectic solvent prepared from natural ingredients is an extracting agent; the curcumin is highly and selectively extracted by utilizing the characteristic of the natural eutectic solvent; the extraction efficiency is improved through ultrasonic treatment. After the extraction, water is used as a solvent; the curcumin is selectively precipitated by an anti-solvent method; sediments are subjected to centrifugation and vacuum drying; the high-purity natural curcumin product is prepared. The method has the advantages that the nontoxic and natural eutectic solvent and the water are used as the extracting agent and a precipitating agent, the production process is simple, efficient, safe and green; the defect that the traditional curcumin production needs a large number of noxious organic solvents and the complicated column separation process is overcome.