▎ 摘　　要

NOVELTY - Preparing lignin/reduced graphene oxide carbon aerogel electromagnetic shielding material involves dissolving graphene oxide and reducing agent in water, adding lignin alkali solution, mixing, ultrasonic cavitation for 3-8 minutes, reducing the solution obtained ultrasonic cavitation at 70-80 degrees C for 3-4 hours, washing to obtain a hydrogel, freezing the hydrogel directionally and then performing freeze drying to obtain an aerogel. The aerogel is carbonized in an inert gas or nitrogen atmosphere to obtain product. USE - Method for preparing lignin/reduced graphene oxide carbon aerogel electromagnetic shielding material used in the field of electromagnetic shielding (claimed). ADVANTAGE - The method is non-toxic, has wide frequency and high efficiency electromagnetic shielding material, the military equipment, aerospace, microwave dark room, electromagnetic information leakage protection, portable mobile device, in simple and cost-effective manner.