Gold mud pigment and preparation method thereof

The preparation method comprises the specific steps that S1, the pH value of a precious metal leaching solution of a precious metal-containing waste blue film material for the semiconductor industry is adjusted to be 3-4 through a sodium hydroxide solution; s2, after the aluminum and the iron are completely hydrolyzed and the jelly is uniformly dispersed in the solution, slowly adding a reducing agent for reaction; after the reaction is finished, filtering to obtain a mixture of colloid and flaky gold powder; diluted hydrochloric acid is adopted as a cleaning agent to clean the mixture until the ferro-aluminum colloid is cleaned up, and flaky gold powder is obtained; and S3, the flaky gold powder and an industrial gelatin solution are fully and evenly mixed for a reaction, after the reaction is finished, clean water cleaning is conducted, and the gold mud pigment is obtained. According to the method, the precious metal leaching solution containing the precious metal waste blue film material in the semiconduct