In the current detection feedback circuit provided by the present embodiment, the base of the transistor 517 is sequentially connected to a resistor 515 and a capacitor 516 (the resistor 515 and the capacitor 516 form a second detection circuit) to form a power detection feedback circuit. The resistor 515 and the capacitor 516 are connected in series between the collector of the transistor 505 of the second stage of amplifier circuit and the base of the transistor 517. The output power of the second stage of amplifier circuit is detected through the resistor 515 and the capacitor 516, and the intensity of the power leaked to the transistor 517 can be controlled. When the radio frequency power amplifier has the input power, the output power of the transistor 505 of the second stage of amplifier circuit will be leaked to the base of the transistor 517 through the resistor 515 and the capacitor 516, so that an operating current of the transistor 517 is varied. The resistor 518 generates the correspondingly control voltage according to the operating current fed back by the collector of the transistor 517, a current flowing through the transistor 520 is controlled through the resistor 519, and a current of the output end of the transistor 520 is respectively input into the base of the transistor 501 of the first stage of amplifier circuit and the base of the transistor 505 of the second stage of amplifier circuit by means of the resistor 521 and the resistor 522, thereby controlling the quiescent operating currents of the first stage of amplifier circuit and the second stage of amplifier circuit, and ensuring the radio frequency power amplifier to operate in a state in which the gain and the output power are stable. Therefore the radio frequency power amplifier provided by the present embodiment can detect a quiescent operating current of the input end of the third stage of amplifier circuit through the current detection feedback circuit, can respectively control the quiescent operating currents of the first stage of amplifier circuit and the second stage of amplifier circuit according to the detected quiescent operating current of the third stage of amplifier circuit, can detect the output power of the second stage of amplifier circuit through the power detection feedback circuit, and can respectively control the quiescent operating currents of the first stage of amplifier circuit and the second stage of amplifier circuit according to the detected output power of the second stage of amplifier circuit, so that the radio frequency power amplifier operates in a state in which the gain and the output power are stable.