The invention relates to the technical field of electronic cigarettes. The invention particularly relates to porous ceramic for an electronic cigarette and a preparation method thereof. The porous ceramic for the electronic cigarette is composed of the following components in percentage by mass: 30-60% of ceramic powder, 1-30% of a pore forming agent, 5-40% of a sintering aid, 10-40% of paraffin and 1-10% of a modifier. The ceramic powder comprises at least two of diatomite, cordierite, fly ash, aluminum oxide, zirconium oxide, silicon carbide, silicon nitride, quartz sand, zircon sand, glasssand, kaolin and clay. The porous ceramic prepared by the method is uniform and stable in pore size distribution; the aperture and porosity of the porous ceramic can be adjusted according to the tasteof a user and the characteristics of tobacco tar, so that the tobacco tar can be fully adsorbed and atomized, the tobacco tar atomization rate is greatly increased, the smoke amount is increased, andthe problems of poor tobacco tar atomization effect and poor taste in the current market are solved.