▎ 摘　　要

NOVELTY - The method involves pouring silica gel solution on a spin coater to spin coating for forming a silica gel film and putting the silica gel film into an oven to solidify for forming a silica gel packaging layer. The silica gel packaging layer is placed on a three-axis moving platform for forming a graphene layer in a middle of the silica gel packaging layer by drop casting forming technology for forming a graphene electrode after drying. A layer of compact, ordered and continuous composite polyvinylidene fluoride thin film is formed on a surface of an aluminium foil paper by using electrostatic spinning technology. A lower packaging layer with the electrode, a pressure sensing film and an upper packaging layer with the electrode are sequentially stacked together. Edges of the upper and lower packaging layers are coated with big 705 silicon rubber for pressing, holding and tightly adhering the packaging layers to form a flexible biosensor with better biocompatibility. USE - Method for preparing a flexible biological sensor (claimed) utilized in an electronic skin, a medical implant, a wearable device or bionic robot (all claimed) for detecting physiological activities e.g. limb movement, breathing, swallowing and muscle vibration, of a human body ADVANTAGE - The method enables coating the edges of the upper and lower packaging layers with the big 705 silicon rubber for pressing, holding and tightly adhering the packaging layers to form the flexible biosensor with better biocompatibility, thus ensuring forming of the flexible biosensor in an efficient manner. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view for showing preparation of a composite polyvinylidene fluoride piezoelectric film based on electro-spinning. 1Micro-pump controller 2Step motor 3Micro-pump executing mechanism 4Polyvinylidene fluoride mixed liquid 5Injector