Aiming at traditional single serial ports and multi-serial port can’t satisfy certain type equipment telecommunication demand, introduce a VxWorks operating system based on shared an interrupt source of multi-serial port driver. Based on the PowerPC architecture, introduce in detail VxWorks embedded operating system of multi-serial port driver development, and present the detailed definition of driving. The results show that the driver is simple, convenient, users can be directly call packaged function and realize serial driver.