The invention discloses an alternating current/direct current charging control guiding circuit of an electric vehicle conduction charging system and a control method of the circuit. The alternating current/direct current charging control guiding circuit includes four parts including a power source waking and self-locking circuit, a CC/CC2 resistance detection circuit, a CP signal processing circuit and a microcontroller. The alternating current/direct current charging control guiding circuit has the advantages that the stand-by power consumption is low, delayed power failure can be achieved, an alternating current/direct current charging control guidance mode and a normal vehicle running guidance mode are both compatible, there are no mechanical contact points, and the service life is long. The provided alternating current/direct current charging control guiding circuit of the conduction charging system is usually integrated in a battery management system or a vehicle control unit. Switch devices adopted in the design are all MOS components, mechanical losses are avoided, the service life of a switch is prolonged, and the reliability of the alternating current/direct current charging control guiding circuit is improved.