A disk operation protection method and a disk controller are disclosed herein. The method includes: receiving a request for a disk operation; obtaining, by a disk controller, operation control parameters corresponding to the current disk area to be operated, and determining whether to allow operation of the current disk area according to the operation control parameters; if determining that the current disk area is allowed to be operated according to the operation control parameters, performing the disk operation. By implementing the embodiments of the present disclosure, the operation of the data stored in a disk is protected, illegal disk operations such as maliciously intended modification are prevented, the disk is protected in the process of generating data, and the defects of the disk protection mechanism in the prior art are overcome.