Safety gummed paper, preparation method thereof and lithium battery

The invention discloses safe gummed paper, a preparation method thereof and a lithium battery, and relates to the technical field of lithium batteries. The safe gummed paper comprises a base material and a pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer comprises the following raw material components: an acrylate monomer, a modified filler, an initiator, a curing agent and a solvent, and the modified filler is obtained by reacting an inorganic filler with a silane coupling agent. The pressure-sensitive adhesive layer in the safety gummed paper contains the modified filler, so that the safety gummed paper has heat-conducting and flame-retardant effects, the thermal abuse performance of the lithium battery and the passing rate of overcharge and high-temperature short-circuit tests are effectively improved, self-discharge caused by burrs generated by welding at the tab position can be reduced, the consistency of the battery performance is improved, and the service life of the lithium bat