The present invention provides a PLC communication-based intelligent electric automobile charging device, which comprises a charging post, an electric automobile, a controller, a PLC power carrier module, a control master CPU module, a sampling module, a man-machine module, a guiding control module, a charging plug and a charging socket of a charging connector, and the like. The charging plug is connected with the charging post. The charging socket is connected with the electric automobile through a cable. According to the technical scheme of the invention, based on the transmission communication between a control strategy and data messages, the charging post, matched with the electric automobile, can be automatically searched and found out. The interior data information of the charging device is modulated through a PLC power carrier board to be transmitted through a power line. The information transmission of charging data is realized in the power carrier communication mode, so that the re-wiring operation is not required. Therefore, the capital investment is reduced. Meanwhile, the device is simple to install and flexible to set.