Abstract: Petroleum coke with high sulfur has high fixed carbon, high heating value and low ash content.Using it as fuel may not only alleviate energy shortage,but also convert it into a useful material.Its combustion characteristics and pollutant emission are not very clear.This paper investigates the combustion characteristics and pollutant emission of petroleum coke in circulating fluidized bed boiler.The results show that petroleum coke with high sulfur can be used as a fuel in industry,its combustion is stable and pollutant emission satisfies national environmental standard.