▎ 摘　　要

NOVELTY - The utility model claims a hand warming device, comprising a heat preservation sleeve and a heating body. wherein the insulating outer sleeve is provided with a containing cavity; the heating body comprises a heating body and a heat preservation carrier; the heating body is graphene metal fibre or carbon fibre; the graphene metal fibre or carbon fibre is fixed on the heat preservation carrier; the heat preservation carrier is detachably installed in the containing cavity. using graphene metal fibre or carbon fibre to heat, replacing heating liquid in the existing hand warmer, no leakage of liquid, using safety performance is improved; In addition, the graphene metal fibre or carbon fibre has fast heating, it can work under the low voltage to generate heat, and the graphene metal fibre or carbon fibre can be bent at any angle, the service life is long.