NOR flash memory and repair method thereof

The present invention provides a NOR flash memory and a repair method thereof. The repair method comprises: determining whether at least a spare memory block is not used; counting the programmed number of each memory block and the erased number of each memory block; distinguishing whether the programmed number is not less than a first preset threshold value, and whether the erased number is not less than a second preset threshold value; and when the corresponding programmed number of the selected memory block is not less than the first threshold value or the erased number is not less than the second preset threshold value, using at least one spare memory block to replace the selected memory block.