A heat storage and preservation finishing liquor, and a preparation method therefor and the use thereof are provided. The heat storage and preservation finishing liquor comprises 10-15% of a silicon-boron polymer, 3-5% of a ceramic nanomaterial, 6-15% of an acidic hot lava material, 1-5% of a polysiloxane cross-linking agent, 5-10% of a dispersing agent, and 3-5% of an adhesive. The heat storage and preservation finishing liquor having been mixed and ground with zirconium beads in a vertical grinder has a particle size of 300-500 nm.