A radio frequency power amplification system, comprising: a radio frequency signal generation circuit, configured to process a baseband digital signal, to obtain an original radio frequency signal; a radio frequency signal processing circuit, configured to: process the original radio frequency signal, to obtain N processed radio frequency signals, wherein N is greater than or equal to 2, decompose the original radio frequency signal, to obtain a first signal component and a second signal component, obtain an n th processed radio frequency signal based on a formula RF n =k n1 ×s 1 + k n2 ×s 2, wherein n=1, 2,..., or N, RF n is the n th processed radio frequency signal, s 1 is the first signal component, s 2 is the second signal component, and k n1 and k n2 are amplitude and phase adjustment coefficients that correspond to the n th processed radio frequency signal at a current moment, determine the amplitude and phase adjustment coefficients that correspond to the n th processed radio frequency signal at the current moment, and determine, based on a preset n th correspondence between an envelope of the baseband digital signal and an amplitude and phase adjustment coefficient, that an amplitude and phase adjustment coefficient that corresponds to an envelope of the baseband digital signal at the current moment is the amplitude and phase adjustment coefficient that corresponds to the n th processed radio frequency signal at the current moment; a power amplifier, configured to perform power amplification on each of the N processed radio frequency signals, to obtain N amplified radio frequency signals; and a combiner, configured to combine the N amplified radio frequency signals. a radio frequency signal generation circuit, configured to process a baseband digital signal, to obtain an original radio frequency signal; a radio frequency signal processing circuit, configured to: process the original radio frequency signal, to obtain N processed radio frequency signals, wherein N is greater than or equal to 2, decompose the original radio frequency signal, to obtain a first signal component and a second signal component, obtain an n th processed radio frequency signal based on a formula RF n =k n1 ×s 1 + k n2 ×s 2, wherein n=1, 2,..., or N, RF n is the n th processed radio frequency signal, s 1 is the first signal component, s 2 is the second signal component, and k n1 and k n2 are amplitude and phase adjustment coefficients that correspond to the n th processed radio frequency signal at a current moment, determine the amplitude and phase adjustment coefficients that correspond to the n th processed radio frequency signal at the current moment, and determine, based on a preset n th correspondence between an envelope of the baseband digital signal and an amplitude and phase adjustment coefficient, that an amplitude and phase adjustment coefficient that corresponds to an envelope of the baseband digital signal at the current moment is the amplitude and phase adjustment coefficient that corresponds to the n th processed radio frequency signal at the current moment; process the original radio frequency signal, to obtain N processed radio frequency signals, wherein N is greater than or equal to 2, decompose the original radio frequency signal, to obtain a first signal component and a second signal component, obtain an n th processed radio frequency signal based on a formula RF n =k n1 ×s 1 + k n2 ×s 2, wherein n=1, 2,..., or N, RF n is the n th processed radio frequency signal, s 1 is the first signal component, s 2 is the second signal component, and k n1 and k n2 are amplitude and phase adjustment coefficients that correspond to the n th processed radio frequency signal at a current moment, determine the amplitude and phase adjustment coefficients that correspond to the n th processed radio frequency signal at the current moment, and determine, based on a preset n th correspondence between an envelope of the baseband digital signal and an amplitude and phase adjustment coefficient, that an amplitude and phase adjustment coefficient that corresponds to an envelope of the baseband digital signal at the current moment is the amplitude and phase adjustment coefficient that corresponds to the n th processed radio frequency signal at the current moment; a power amplifier, configured to perform power amplification on each of the N processed radio frequency signals, to obtain N amplified radio frequency signals; and a combiner, configured to combine the N amplified radio frequency signals.