The invention provides a method for reading and writing data by a CD driver, wherein, the CD driver is provided with a spindle motor which is used for rotating an optical disc and a read write head which is used for reading or writing data into the optical disc. The method comprises the following steps: adjusting the position of the read and write head for the first time to ensure that a specificdistance is left between the read and write head and the optical disc, wherein, when the specific distance between the read and write head and the optical disc is maintained, the optical disc possesses the minimum average vibration quantity in the process that lower rotational speed of the spindle motor is changed to a high rotational speed; then, increasing the rotational speed of the spindle motor from the low rotational speed to the high rotational speed; afterwards, adjusting the position of the read and write head for the second time to ensure that the read and write head moves to the orbital position of the optical disc to be read or written, and starting to read or write data on the optical disc.