The present invention relates to a kind of Doherty power amplifiers.The Doherty power amplifier for the exemplary embodiment conceived according to the present invention can include: input signal is decomposed into the first decomposed signal and the second decomposed signal by power divider;Carrier amplifier amplifies first decomposed signal;Peaking amplifier, amplify second decomposed signal, wherein, the power divider decomposes the input signal, the mode in the following way are as follows: the ratio of first decomposed signal and second decomposed signal is different from each other according to the power of the input signal.