The invention discloses an energy storage and heat supply type electric heating cord based on phase-change materials and relates to energy storage and thermal retention equipment of the phase-change materials. The cord can be spliced and extended into different shapes and supply heat to certain parts of a human body. The energy storage and heat supply type electric heating cord comprises braided fabric, a waterproof insulating rubber layer, a resistance wire, a conductive contact, the phase-change materials, a thermal retention thermal media, a waterproof film layer and a conductive contact buckling port. By energizing and heating the resistance wire, the phase-change materials absorb and store large amount of latent heat, and meanwhile the heat is transmitted to the thermal retention thermal media, and the braided fabric is heated; after the energization is finished, the temperature of the thermal retention thermal medium starts to drop, when the temperature drops to a certain degree, the phase-change materials are solidified and release heat, the heat is transmitted to the thermal retention thermal media, and the braided fabric keeps warm continuously. According to the electric heating cord, by utilizing the special physical properties of the phase-change materials, the heat is provided for the braided fabric, and the human parts can keep warm and repel cold continuously.