High-liquid-absorption-rate porous ceramic matrix and heating element

The invention relates to the technical field of porous ceramics, in particular to a high-liquid-absorption-rate porous ceramic matrix and a heating element, and the high-liquid-absorption-rate porous ceramic matrix is prepared from the following raw materials in parts by weight: 25-90 parts of porous silicon dioxide microspheres, 10-30 parts of glass powder, 0.1-25 parts of diatomite, 0.1-10 parts of quartz sand and 0.1-10 parts of aluminum oxide. The porous ceramic matrix has the characteristics of small pores, high liquid absorption rate and large ratio of the liquid absorption rate to the porosity, tobacco tar permeation and atomization are facilitated, the atomization rate of the tobacco tar is increased, the smoke amount is increased, and the experience feeling of a user is improved; due to the fact that the adopted porous silicon dioxide microspheres are provided with micropores, and the micropores are small and large in number, tobacco tar can penetrate through the porous silicon dioxide microspheres m