The invention discloses a weather-proof chemically-crosslinked polyethylene insulated material resistant to the temperature of 150 DEG C. The weather-proof chemically-crosslinked polyethylene insulated material comprises raw materials in parts by weight as follows: 100 parts of low-density polyethylene, 1.0-3.0 parts of a peroxide crosslinking agent, 1.0-6.0 parts of carbon black motherbatch, 0.1-1.0 parts of an antioxidant and 0.1-1.0 part of a nucleating agent. According to the weather-proof chemically-crosslinked polyethylene insulated material resistant to the temperature of 150 DEG C, low density polyethylene with the density being 0.920+/-0.003 g/cm<3> and the melt flow index being 1.0-3.0 g/10 min is taken as a main raw material, the production efficiency is effectively improved by sufficiently utilizing the characteristics of fluidity and good processability, and requirements for processing equipment is reduced; the prepared insulated material has good high-temperature resistance, ageing resistance and sunlight ageing resistance, excellent insulating property and the like, the thermal ageing service life is far longer than that of a conventional product at the temperature of 105 DEG C, the actual demand can be met, and defects of an existing conventional product resistant to 90 DEG C are effectively overcome.