Abstract: Based on the field inventory data, the aboveground deadwood debris carbon storage under different fire severities was analyzed in Huzhong forest region of Great Xing’an Mountains. The results showed that the fire severity had a significant effect on aboveground deadwood debris carbon storage. The deadwood debris carbon storage was in the order of highseverity > low-severity > unburned in Larix gmelinii stands, and mixed coniferbroadleaf stands (L. gmelinii and Betula platyphylla), and in the order of high severity > unburned > low-severity in B. platyphylla stands. Fire disturbance significantly changed the component percentage of the deadwood debris carbon storage. The component percentage of snags increased and litter decreased with the increasing fire severity. Logs and stumps did not change significantly with the increasing fire severity. The spatial variation of deadwood debris carbon storage in forests burned with lowseverity fire was higher than that in unburned forests. The spatial variation of deadwood debris carbon storage with highseverity fires was lowest. This spatial variation needed to be accounted when calculating forest deadwood debris carbon storage.