Treatment method of hydrometallurgy raffinate

The invention relates to a treatment method of hydrometallurgy raffinate, which comprises the following steps: in the presence of an alkalizer, carrying out graded coprecipitation reaction on the raffinate by using characteristic seed crystals until the content of heavy metals in the raffinate is less than 10mg/L and the content of COD (Chemical Oxygen Demand) is less than 300mg/L. According to the treatment method provided by the invention, the characteristic seed crystal is recycled as a renewable resource, synchronous removal and resource recovery of organic matters and heavy metal ions in the raffinate wastewater can be realized, the COD (Chemical Oxygen Demand) of the finally obtained raffinate effluent is less than 300mg/L, the concentration of the heavy metal ions is less than 10mg/L, the heavy metal recovery rate is more than 98%, the hydraulic retention time is short, and the treatment cost is low. The effluent turbidity is small, no sludge is generated, no secondary pollution is caused, and the cost