The invention discloses a silylene film produced through mechanical stripping, and an application of the obtained silylene film in batteries. A production method of the silylene film comprises the following steps: physically covering the silicon surface of a metal film with a two-dimensional nanomaterial, carrying out high temperature treatment to diffuse the silicon element to the interface of the two-dimensional nanomaterial and the metal film, decreasing the temperature to room temperature, dispersing a sample in a surfactant-containing solvent liquid, allowing polar molecules to easily enter the interface of the metal film and the above substrate material, carrying out ultrasonic stirring to increase friction of the metal film and the substrate material, and stripping the two-dimensional nanomaterial and silylene from the silicon substrate to obtain the silylene film. The silylene film is mechanically stripped from a liquid phase under the physical action, so physical properties of a silylene material are protected, high vacuum and high danger gas working environment is avoided, and use of severely toxic organic reactants is avoided; and the two-dimensional nanomaterial can be used repeatedly, so the cost is reduced, and the silylene film has wide market application values in the field of solar batteries.