Preparation method of negative pole piece, negative pole piece and battery

The invention discloses a preparation method of a negative pole piece, the negative pole piece and a battery, and relates to the technical field of batteries. The preparation method of the negative pole piece comprises the following steps: providing a precursor solution which comprises fluorine-containing acrylate, lithium salt, an initiator and a solvent; and providing a base film, arranging the precursor solution on the base film, and curing to form a fluorine-containing polymer film, thereby obtaining the negative pole piece. According to the preparation method provided by the invention, the fluorine-containing polymer film is formed on the surface of the base film through the fluorine-containing acrylate in a curing polymerization manner, so that the deposition and dissolution overpotential of lithium ions can be effectively improved, the lithium ions are guided to be uniformly deposited on the surface of the base film, and the generation of lithium dendrites is inhibited; the volume change caused by repe