Hot-melt adhesive for third-generation nuclear power plant cable accessories and preparation method of hot-melt adhesive

The invention discloses a hot-melt adhesive for third-generation nuclear power plant cable accessories and a preparation method of the hot-melt adhesive. The hot-melt adhesive for the third-generation nuclear power plant cable accessories comprises the following components in part by mass: 100 parts of main polymer, 40-50 parts of tackifier, 2-4 parts of complex antioxidant, 3-5 parts of lubricant, 5-10 parts of viscosity modifier, 0.1-0.2 part of plasticizer and 0.5-1.0 part of structure transforming agent. The hot-melt adhesive disclosed by the invention has good fluidity and relatively high viscosity, has relatively good peeling strength, shearing strength and sealing performance with metallic and non-metallic materials, can be used in a radiation field environment for a long time, and has excellent radiation resistance (gamma-ray radiation of 3000kGy) and ageing resistance, and the service life of the hot-melt adhesive reaches over 60 years.