A dual input radio frequency circuit, comprising a first circuit (201, 401) and a second circuit (202, 402), wherein: the first circuit (201, 401) is configured to: receive a first signal and a second signal; split the first signal into a third signal and a fourth signal, and split the second signal into a fifth signal and a sixth signal; adjust a phase of the fifth signal to obtain a seventh signal; and combine the seventh signal and the third signal into an eighth signal; and the second circuit (202,402) comprises a primary power amplifier branch and a secondary power amplifier branch, the primary power amplifier branch comprises an outphasing circuit, the secondary power amplifier branch comprises a secondary power amplifier, the outphasing circuit is configured to process the fourth signal and the sixth signal, and the secondary power amplifier is configured to process the eighth signal; characterized in that the first circuit further comprises an attenuation network and a combiner; the attenuation network is configured to attenuate the seventh signal and the third signal; and the combiner is configured to combine the attenuated seventh signal and the attenuated third signal into the eighth signal; and the eighth signal is configured to be input to a signal input end of the secondary power amplifier; and the radio frequency circuit is configured such that if an amplitude of the eighth signal reaches a signal threshold, the secondary power amplifier is started to perform amplification processing on the eighth signal, wherein the signal threshold is a minimum signal amplitude required to start the secondary power amplifier and a value of a conduction angle of the secondary power amplifier is greater than 120°. the first circuit (201, 401) is configured to: receive a first signal and a second signal; split the first signal into a third signal and a fourth signal, and split the second signal into a fifth signal and a sixth signal; adjust a phase of the fifth signal to obtain a seventh signal; and combine the seventh signal and the third signal into an eighth signal; and the second circuit (202,402) comprises a primary power amplifier branch and a secondary power amplifier branch, the primary power amplifier branch comprises an outphasing circuit, the secondary power amplifier branch comprises a secondary power amplifier, the outphasing circuit is configured to process the fourth signal and the sixth signal, and the secondary power amplifier is configured to process the eighth signal; characterized in that the first circuit further comprises an attenuation network and a combiner; the attenuation network is configured to attenuate the seventh signal and the third signal; and the combiner is configured to combine the attenuated seventh signal and the attenuated third signal into the eighth signal; and the eighth signal is configured to be input to a signal input end of the secondary power amplifier; and the radio frequency circuit is configured such that if an amplitude of the eighth signal reaches a signal threshold, the secondary power amplifier is started to perform amplification processing on the eighth signal, wherein the signal threshold is a minimum signal amplitude required to start the secondary power amplifier and a value of a conduction angle of the secondary power amplifier is greater than 120°.