▎ 摘　　要

NOVELTY - The method for preparing graphene-sodium alginate-carbon nanotube composite elastic aerogel, involves (1) mixing sodium alginate solution, graphene oxide solution and carbon nanotube suspension, stirring, freeze-drying to obtain composite aerogel, (2) placing the composite aerogel in hydrazine hydrate under steam atmosphere, carrying out reduction reaction, leaving still and ventilating to obtain graphene-sodium alginate-carbon nanotube composite elastic aerogel. USE - Method for preparing graphene-sodium alginate-carbon nanotube composite elastic aerogel for strain sensor. ADVANTAGE - The method enables preparation of graphene-sodium alginate-carbon nanotube composite elastic aerogel with high mechanical durability, excellent elasticity, structural continuity, high sensitivity, controlled pore structure, excellent mechanical properties and excellent hydrophobic properties.