The invention discloses spicy chili oil and a preparation method thereof. The chili oil comprises 600 parts of 
rapeseed oil, 144 parts of chilies, 12.2 parts of sesame, 5.7 parts of pepper 
powder, 4.8parts of 
peanut meal, 3 parts of Sichuan pepper 
meal, 3 parts of roses, 3 parts of scallions, 3 parts of garlic and 0.6 part of spice. The preparation method comprises the following steps of pulverizing the chilies and the spice to obtain 
chili powder and spice 
powder; heating 300 parts of the 
rapeseed oil to 280 DEG C, and naturally cooling the oil to obtain cold oil; heating the rest of the 
rapeseed oil to 280 DEG C; adding the scallions and the garlic, conducting frying until a spicy smell is generated, and taking out the mixture to obtain hot oil; adding 50 parts of the cold oil into thehot oil; when the 
oil temperature is lowered to 220 DEG C, adding the sesame and the 
chili powder into the hot oil; after the color of the 
chili powder is changed, adding the rest of the cold oil foruniform mixing, and then adding the 
peanut meal, the Sichuan pepper 
meal, the pepper 
powder, the spice powder and the roses to obtain a finished product. The chili 
oil can solve the problems that existing chili oil is light in spicy smell, poor in spicy smell persistence and too hot and greasy.