Abstract: The coking performance of coal tar 1, coal tar 2, vacuum residue W2 and FCC slurry was studied. The results show that the liquid yield increases and coke yield decreased if the raw oils are characterized by larger molecule, rich in paraffin and less in aromatic. The kinetics equation and parameters was obtained by infinitely parallel reaction model based on the data of thermal analyzer. The coking reaction is a first-order reaction and the apparent activation energy(Ea) is 18.04- 77.29 kJ/mol in 350-510 ℃. The order of activation energy of four raw materials is coal tar 2 > vacuum residue W2 > coal tar 1 > slurry. The factors influencing activation energy Ea was divided into 4 classes by the fuzzy clustering analysis method. It is found that the higher density (ρ) and the total number of carbon (CT) of raw oils, the lower the activation energy is. However, the more the residue carbon (CR) and the number of aromatic carbon (CA), the higher the activation energy is.