Insulating protective film for preventing electrolyte leakage and preparation method thereof

The invention provides an insulating protective film for preventing electrolyte leakage and a preparation method thereof. The insulating protective film comprises a first bottom film layer, a first glue layer, a first film material layer, a grid base material layer, a second film material layer, a second glue layer and a second bottom film layer from bottom to top, the first glue layer and the second glue layer are made of the same material and comprise the following components: 75-85% of a silane-based acrylic polymer, 5-10% of dimethyl silicone oil, 6-10% of a methoxypropyltriethoxysilane-silane cross-linking agent, 2-5% of a titanium tetraacetate-organic titanium catalyst and 0.5-1.5% of a diluent isopropanol; the first membrane material layer and the second membrane material layer are made of the same material and comprise the following components: 75-85% of polydimethylsiloxane, 5-8% of silicon oxide nanoparticles, 5-8% of a trimethoxysilane coupling agent, 5% of an environment-friendly flame retardant a