The invention discloses a disk bad track scanning method which comprises the following steps: firstly, scanning a block of a first layer in a disk, entering a second layer when the block of the firstlayer is a first fault block, scanning a target block with finer granularity corresponding to the first fault block, determining a second fault block in the target block, and otherwise, continuing toscan the block of the first layer. Therefore, according to the scheme, coarse-grained scanning is firstly carried out on the disk, that is, blocks of the first layer are scanned, if the blocks of thefirst layer break down, fine-grained scanning is carried out on the blocks of the first layer, that is, the second layer is skipped into, the target blocks corresponding to the broken blocks of the first layer are determined in the second layer, and the target blocks are scanned to determine the broken blocks in the target blocks. Coarse-grained scanning can save the scanning time of faultless blocks, and fine-grained scanning can increase the accuracy of faulty blocks, so that the full-disk scanning rate is increased, and the accuracy of a scanning result is ensured.