The invention discloses an antibiosis ceramic product with coal ash as the main raw material and a preparing method of the antibiosis ceramic product. The ceramic product is prepared from, by mass, 50-70% of coal ash, 10-30% of bone ash, 5-20% of clinker, 5-10% of plastic clay, 0-10% of fluxing agent, 1-10% of antibiosis powder and 0-6% of auxiliary material. According to the antibiosis ceramic product and the preparing method of ceramic bricks of the antibiosis ceramic product, a large amount of coal ash is consumed so that the coal ash can be efficiently utilized in the ceramic field, the fate that the landfill of the coal ash is conducted and the coal ash is used for making non-ceramic cement bricks or only used for producing low-quality ceramic bricks and the like is changed, and the obtained product has the antibiosis and bacterium-resistant functions.