A CD-R burning deice includes a plurality of burning units connected with each other via an external interface. The burning unit further includes an operating unit, a source drive, a chipset, a hard disk and a plurality of burners. The source drive serves to read data stored in a parent disk of the source drive, and the chipset serves to execute the burning function according to the mode of the operating unit, read the data of the parent disk of the source drive through an internal interface, transmit commands or data through the external interface to the chipset of other burning units, or receive commands or data transmitted by the external interface. Meanwhile, the hard disk serves to store the data of the chipset through the internal interface, and burn the data to the disk inserted into the burner itself after being activated by the chipset.