A device for reading and writing a CD comprises a lower housing, an upper housing which can be buckled with the lower housing body, a CD cover arranged on the upper housing body, a mechanism load bearing set, and a main shaft motor fixed on the mechanism load bearing set. The mechanism load bearing set is arranged between the upper housing body and the lower housing body; an opening is formed on the upper housing body; the main shaft motor is opposite to the CD cover through the opening; the main shaft motor comprises a body, and a base plate and a load bearing plate arranged at two axial ends of the body; the base plate is fixed on a mechanism load bearing set; the load bearing plate is provided with a holding seat for clamping and fixing CD; and lug bosses are correspondingly formed on the CD cover and the holding seat. Lug bosses are formed on the CD cover, so that in the use process of the read and write device, when the CD cover is pressed and transformed, the other parts of the CD cover are not easy to contact the CD, and the main shaft motor can be maintained to rotate, thereby ensuring that the read and write device can stably read and write CD information.