The invention discloses an electromobile self-adaptive charge control method based on a PLC. The method comprises the following steps of electromobile AC charging interface controlling, PLC communication signal coupling, device self-adaption of charge control, parameter self-adaption of charge control, charge process control and charge ending control, wherein in the step of PLC communication signal coupling, in power supply equipment and an electromobile, a capacitor CPLC and a PLC module which is connected with one end of the capacitor CPLC are connected between a CP line and a PE terminal, an inductor L is connected to the common end of the CP line and the capacitor CPLC, the other end of the inductor L is connected with a first detecting point, and at last a resistor is in parallel connection with the two ends of the inductor L. According to the electromobile self-adaptive charge control method based on the PLC, PLC signals are coupled on guide control lines CP and PE, device self-adaption and parameter self-adaption are achieved, when the electromobile conducts energy supplement, the difference of power supply devices and the difference of charging parameters in various regions can be omitted, charging operability is simplified, the safety and reliability are high, and a promotion effect is achieved on large-scale development of the electromobile.