▎ 摘　　要

NOVELTY - Method for preparing pressure sensor, involves (a) dissolving cellulose in lithium bromide solution, stirring at 60-150 degrees C to obtain a cellulose-lithium bromide solution, adding graphene to the cellulose-lithium bromide solution, ultrasonically treating in an ultrasonic two-dimensional material stripper, adding additive and stirring to obtain a graphene-cellulose-lithium bromide solution, (b) using a peristaltic pump, dripping the graphene-cellulose-lithium bromide solution into a coagulation bath and coagulating to obtain cellulose microspheres, and (c) pouring a polymer substrate into a substrate mold, uniformly and densely spreading the cellulose microspheres on the polymer substrate and curing the substrate to obtain the product. USE - The method is useful for preparing pressure sensor. ADVANTAGE - The pressure sensor has high sensitivity and hair follicle-like structure, produces huge resistance changes, keenly perceives external changes, exhibits synergistic effect of graphene and lithium, and improves sensor conductivity.