The invention relates to the technical field of organic 
heat carrier production, in particular to a novel long-service-life energy-saving environment-friendly high-temperature synthetic organic 
heat carrier. A method comprises the following steps: 1 preparing 
raw material; 2, heating and feeding; 3, stirring and mixing; 4, performing pulse blending; and 5, discharging a finished product. The beneficial effects are that according to the invention, imported raw materials are replaced by an 
isopropyl biphenyl mixture; the product has the advantages of no color, no 
odor, no 
corrosion to equipment,low kinematic 
viscosity, high flow rate, good pumpability, high 
thermal efficiency, 
single component, high purity, low 
vapor pressure, narrow 
distillation range, good high-temperature 
thermal stability and good low-temperature flowability, can replace hydrogenated 
terphenyl and dibenzyl 
toluene, and has wide market prospects, thereby greatly reduces the production cost. The organic 
heat carrier completely meets the operation requirement of a low-pressure 
liquid phase, has a good cleaning function of preventing 
solid coke scale, is particularly suitable for being used for a long time at the high temperature of 350 DEG C, is long in service life, and has the excellent performances of being renewable, energy-saving, safe, environment-friendly and high in 
cost performance.