The invention provides a thermoplastic modified polyethylene material for electric insulators, wherein the thermoplastic modified polyethylene material is prepared from the following raw materials byweight: 45-70% of polyethylene, 0-8% of a toughening agent, 10-25% of an inorganic filler, 12-25% of a bromine-based flame retardant, 0-6% of a synergistic flame retardant, 0.5-1.5% of a stabilizer, 0-1% of a coupling agent, and 0-1% of a lubricant, the raw materials are stirred and mixed in a high-speed mixer, and the mixture is extruded and granulated by a twin-screw extruder to obtain the product. According to the present invention, the thermoplastic modified polyethylene material has advantages of excellent comprehensive performance, stable flame retardancy, low density and smooth surfaceproperty, is the thermoplastic material, can be recovered and reused, and meets the environmental protection trends; and with the application of the thermoplastic modified polyethylene material in thepreparation of insulator product, the process is simple, the production cycle is short, the production environment is free of dust, and the product can be recovered and reused after the used life isachieved and the product is rejected so as not to cause white pollution.