Digital sum value (DSV) for the data of the optic discs needs to be effectively suppressed, a method based on enumerating to effective inhibit the digital sum value of the optic disc data is proposed. This method cuts the raw data into pieces to get modulation, enumerates all possible bit streams, calculates the DSV of each bit stream. This method can completely show the DSV characteristics in all of possible bit streams, thus can select the appropriate stream as the modulation data stream. This method is tested in laboratory and production line, that can be completely verified and is a very good suppression of the DSV.