Power amplifier and radio frequency front-end module

The invention discloses a power amplifier and a radio frequency front-end module. The power amplifier can comprise a first-stage power amplification circuit, a second-stage power amplification circuit, a choke unit and a stabilization unit. Wherein the power supply end of the second-stage power amplification circuit is connected to the first power supply end, and the choke unit is connected between the power supply end of the first-stage power amplification circuit and the first power supply end. The stabilizing unit and the choke unit are connected in parallel, and the stabilizing unit comprises at least one resistor. Specifically, the stabilizing unit can be resistive, so that a part of out-of-band low-frequency signals in radio-frequency signals which pass through the second-stage power amplification circuit and are coupled to the first-stage power amplification circuit at the rear stage pass through the stabilizing unit, and the stabilizing unit can restrain the out-of-band low-frequency signals, thereby