The invention discloses a writing control method and device of a disk array, and belongs to the technical field of storage. The method comprises the steps as follows: a writing request is received, wherein the request comprises data which need to be written into the disk array, the disk array comprises multiple physical disks, each physical disk is divided into multiple strip units and each strip unit comprises at least one logic block; to-be-written strips are determined according to the writing request, wherein each strip comprises a same number of strip units, the number of the strip units included in each strip is smaller than the total number of the physical disks included in the disk array, the strip units included in different strips are different, and different strip units in one strip are located on different physical disks; whether the pressure of the physical disks to which the strip units into which the data are to be written in the to-be-written strips belong in current time exceeds preset pressure or not is judged; and when the pressure of the physical disks to which the strip units into which the data are to be written in the current time belong exceeds the preset pressure, the data are written into the to-be-written strips.