Battery separator with noodle type deposition surface layer and preparation device thereof

The utility model discloses a battery separator with a noodle type deposition surface layer and a preparation device thereof. A central layer of the battery separator is arranged below an injector and above an electric field grounding flat plate; the injector is provided with a capillary tip capable of swinging freely, and a solution in the injector is sprayed out in a random direction and thrown to the electric field grounding flat plate; an electric field retainer is arranged between the injector and the electric field grounding flat plate, a solution in the injector is deposited on the central layer in the form of filaments as long as possible in the midway like noodles in the process of pulling the solution from the tip of the capillary tube to the electric field grounding flat plate, and a three-dimensional heat insulation fiber net with a plurality of air containing micro spaces is formed; and the deposition interface of the deposition layer and the surface layer of the central layer are fused or adhere