The invention discloses a radio-frequency power amplifier and also relates to a mobile terminal using the radio-frequency power amplifier. The radio-frequency power amplifier comprises at least two stages of amplifying circuits, wherein a feedback inductor is arranged between a transistor collector of the post-stage amplifying circuit and a transistor collector of the prior-stage amplifying circuit, so that a transistor of the post-stage amplifying circuit can obtain the required collector bias voltage from the transistor collector of the prior-stage amplifying circuit; a transistor collector of the last-stage amplifying circuit is connected with a feeding inductor. During working of the radio-frequency power amplifier, all stages of the amplifying circuits can be turned off as required, so that various working modes such as the high working mode, the medium working mode and the low working mode can be achieved, and the efficiency under different output power is improved.