The invention relates to a multifunctional communication interface machine device, in particular to a multifunctional communication interface machine device based on a PowerPC embedded system. The multifunctional communication interface machine device based on the PowerPC embedded system comprises a CPU core board, a mother board, interface boards and a power module. A processor of the PowerPC embedded system is carried by the CPU core board. The mother board serves as a main board of the multifunctional communication interface machine device, and mainly comprises a CPLD circuit, an extension serial port circuit, a bus level conversion circuit, an RTC clock circuit, a CAN interface circuit and a 422/485 interface circuit. The interface boards comprise CAN interface boards and 422/485 interface boards. The CPU core board is connected with the bus level conversion circuit on the mother board, and is connected with the CPLD circuit, the extension serial port circuit and the RTC clock circuit after level conversion. The CPLD circuit is connected with the CAN interface circuit through a bus of the address and data time division multiplexing mode. Four paths of 232 serial interfaces are extended by the extension serial port circuit through a four-channel asynchronous transceiver STC16C554 chip to be connected with the 422/485 interface circuit. The CAN interface boards and the 422/485 interface boards are connected with the CAN interface circuit and the 422/485 interface circuit on the mother board respectively.