Abstract: The gasification kinetic characteristics of petroleum coke treated in micromave was studied at 1 000~1 150 ℃ with a water vapor fraction range of 30%~100% by using a thermogravimetric analyzer, and the experimental data was fitted with four kinetic models. The results show that the gasification rate of petroleum coke treated in microwave increases with the decrease of microwave irradiation time, power and temperature. At 1 100 ℃, the steam gasification rate of petroleum coke-treated increases with coke conversion initially, and then decreases after reaching a maximum value when the coke conversion is about 20%, which does not change with the microwave treatment conditions and the water vapor fraction. However, the maximum rate occurs earlier with the increase of gasification temperature. The steam gasification reaction rate of petroleum coke by microwave treatment at different temperatures can be well fitted with the normal distribution function model, which has the correlation coefficients above 0.97.