A DC/DC converter, comprising: a primary-side winding, a secondary-side winding, a resonant inductor (Lr), a resonant capacitor (Cr), and a noise suppression network, wherein the primary-side winding and the secondary-side winding form a transformer; the noise suppression network is connected between a primary-side quiescent point (N, G) and a secondary-side quiescent point (D, M) of the transformer, the primary-side quiescent point (N, G) is a direct current stable potential at an input terminal of the DC/DC converter, and the secondary-side quiescent point (D, M) is a direct current stable potential at an output terminal of the DC/DC converter; a first parasitic capacitance (C AD) connected between a first terminal of the primary-side winding and the secondary-side quiescent point (D, M) is equal to a second parasitic capacitance (C BD) connected between a second terminal of the primary-side winding and the secondary-side quiescent point (D, M); and the noise suppression network is configured to generate a suppression current, a direction of the suppression current is opposite to a direction of a total noise current generated by the resonant inductor (Lr) and the resonant capacitor (Cr), wherein the noise suppression network comprises a signal source and an impedance network; and the signal source and the impedance network are connected between the primary-side quiescent point (N, G) and the secondary-side quiescent point (D, M) after being connected in series, wherein the signal source couples energy from the resonant inductor (Lr); and a voltage amplitude of the signal source is directly proportional to a voltage amplitude of the resonant inductor (Lr), and wherein the signal source comprises a cancellation inductor; and the cancellation inductor is configured to couple energy from the resonant inductor (Lr), and the cancellation inductor is connected between the primary-side quiescent point (N, G) and the secondary-side quiescent point (D, M) after being connected in series to the impedance network. the primary-side winding and the secondary-side winding form a transformer; the noise suppression network is connected between a primary-side quiescent point (N, G) and a secondary-side quiescent point (D, M) of the transformer, the primary-side quiescent point (N, G) is a direct current stable potential at an input terminal of the DC/DC converter, and the secondary-side quiescent point (D, M) is a direct current stable potential at an output terminal of the DC/DC converter; a first parasitic capacitance (C AD) connected between a first terminal of the primary-side winding and the secondary-side quiescent point (D, M) is equal to a second parasitic capacitance (C BD) connected between a second terminal of the primary-side winding and the secondary-side quiescent point (D, M); and the noise suppression network is configured to generate a suppression current, a direction of the suppression current is opposite to a direction of a total noise current generated by the resonant inductor (Lr) and the resonant capacitor (Cr), wherein the noise suppression network comprises a signal source and an impedance network; and the signal source and the impedance network are connected between the primary-side quiescent point (N, G) and the secondary-side quiescent point (D, M) after being connected in series, wherein the signal source couples energy from the resonant inductor (Lr); and a voltage amplitude of the signal source is directly proportional to a voltage amplitude of the resonant inductor (Lr), and wherein the signal source comprises a cancellation inductor; and the cancellation inductor is configured to couple energy from the resonant inductor (Lr), and the cancellation inductor is connected between the primary-side quiescent point (N, G) and the secondary-side quiescent point (D, M) after being connected in series to the impedance network.