The invention discloses a method for repairing a front part normal and rear part abnormal fault of a Seagate hard disk sector. The steps comprises the steps of S1, clearing NG-LIST when a hard disk in a disk recognized state; S2, scanning defective pixels in the hard disk sequentially, and adding each scanned defective pixel to a G table and carrying out reestablishment; and S3, determining whether the entire hard disk is searched or not, finishing if the entire hard disk is searched, otherwise going to the S2. The method has the advantages that the defective pixels in the hard disk can be quickly and accurately scanned, both an 512Kb hard disk and a 4K technology hard disk can be repaired, the problem that the hard disk cannot be recognized can be solved, a repairing success rate is high, the repairing speed is fast, and the repairing efficiency is high.