The invention belongs to the technical field of ceramics, and in particular relates to a negative ion easy-cleaning functional ceramic additive. The negative ion easy-cleaning functional ceramic additive is made of the following raw materials by mass: 10 to 16% of Chongguang stones with a particle size of 5-20 microns, 16 to 25% of tourmaline with a particle size of 5-15 microns, 5-15% of copper pectolite with a particle size of 5-20 microns, 8-12% of nano titanium dioxide, 6-8% of nano zinc oxide, 5-10% of lead-free frits, 7-20% of rare earth materials, 8-10% of superfine alumina, 8-15% of superfine quartz powder and 5-10% of sodium carbonate. The preparation method of the additive comprises the following steps of carrying out mixed ball-milling on the lead-free frits, the rare earth materials, the superfine alumina, the superfine quartz powder and the sodium carbonate firstly; and then, adding the Chongguang stones, the tourmaline, the copper pectolite, the nano titanium dioxide andthe nano zinc oxide into the obtained product, and ball-milling the obtained mixture, so that the additive with a particle size of 1-10 microns is obtained. The additive disclosed by the invention hasa self-polarizing performance, and has strong adsorption and decomposition functions, so that negative ions are produced; and after the additive is added into a ceramic, the ceramic is extremely easyto clean and not stained, and has no hidden dirt, and the negative ion easy-cleaning functional ceramic additive has a strong affinity to water.