The invention discloses an engine 
anhydrous cooling liquid and a preparation method thereof, wherein the engine 
anhydrous cooling liquid comprises the following raw materials by the weight percentage:60-70% of 
propylene glycol, 25-30% of 
ethylene glycol, 3-4% of 1,2-aminoazophenylene, 1-2% of 
sodium nitrate, 2-3% of 
glycerol, 1-2% of 
triethanolamine, 0.5-1.5% of 
sodium hydroxide, and 0.1-1% of apigment. The 
anhydrous cooling liquid has the 
freezing point lower than -52 DEG C and the 
boiling point more than 190 DEG C and has a large thermal safe space, so with the use of the product, the anhydrous cooling liquid can maintain a good state for operation, adequate power is maintained, 
noise is reduced, a water tank does not produce 'boiling', and cylinder 
score is not generated. With use ofthe anhydrous cooling liquid, zero 
corrosion can be achieved, no water 
rust is generated, cleaning and repair are not needed forever, and boiling, cylinder 
score, water tank blocking, water 
rust, water scale, 
corrosion and 
cavitation corrosion, engine fatigue, 
nausea, explosive vibration, precombustion, large 
noise, unstable 
idle speed, 
cylinder pressure reduction, insufficient power, 
oil consumption increase and large 
exhaust gas emission 
smoke and other phenomena are thoroughly eliminated.