The invention discloses a biasing circuit used for a radio frequency power amplifier, and the biasing circuit comprises a first biasing circuit and a second biasing circuit which are connected in series, wherein a first end of the first biasing circuit is connected with a base electrode of an amplification device, a second end of the first biasing circuit is connected with the first end of the second biasing circuit, and the second end of the second biasing circuit is grounded; the invention also discloses a radio frequency power amplifier comprising the biasing circuit, and the radio frequency power amplifier comprises a power source, wherein one end of the power source is grounded, the other end of the power source is connected with the base electrode of the amplification device throughan input matching network and a capacitor C3 which are connected in series, an emitting electrode of the amplification device is grounded, and a collection electrode of the amplification device is connected with a circuit power supply through a choke coil and further connected with an antenna end through an output matching network. The biasing circuit provided by the invention is used for the radio frequency power amplifier and can simultaneously improve linearity and thermal stability of the radio frequency power amplifier.