The invention discloses a fault disk data reconstruction method in a RAID (redundant array of independent disk) group, and relates to the technical field of data storage. The method includes the steps: connecting disk arrays of a fault RAID group; confirming a fault logic disk; turning off a power supply of a fault hard disk; finding out a last broken hard disk in the fault logic disk; performing power on for the last broken hard disk; modifying the state of the hard disk into FINE; modifying the state of the fault logic disk into one Drive Fail; restarting the fault logic disk; confirming whether the fault logic disk is successfully on-line or not; confirming a condition that the loss caused by a damaged RAID is effectively reduced through integrity of storage data in the RAID group. The reconstruction method is simple to operate and convenient to use.