Abstract: Coke burning of CCR heel catalyst with high carbon content was done in lab and the physical properties of the regenerated heel catalyst were characterized. The results show that the heel catalyst contains graphite carbon and the carbon on the dead zone catalyst can be ignited at 540℃ in low oxygen content (1.0v %) atmosphere, while the coke on the heel catalyst can be burned up at 480℃ in high oxygen content (21v %) atmosphere.