▎ 摘　　要

NOVELTY - Humidity-sensitive material, comprises water, polyurethane, hydroxyethyl cellulose, xanthan gum, glycerin and graphene. USE - Humidity-sensitive material used in flexible humidity sensor (claimed). ADVANTAGE - The humidity-sensitive material has high sensitivity, wide response range, wearable and non-toxic. The method is cost-effective and simple to process, and realizes batch preparation and large-scale production in industry. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: A flexible humidity sensor, which comprises electrodes of the flexible humidity sensor are coated with the humidity sensitive material. A method for preparing flexible humidity sensor, which involves: (a) using vacuum evaporation, electroplating or magnetron sputtering to deposit a metal layer on the flexible substrate, and then use laser direct writing or photolithography to write the metal layer to obtain electrodes with customized patterns. The plasma etching is performed on the electrode to modify the electrode surface, and then used a blade coating or screen printing process to apply the humidity-sensitive material to the electrode surface.