According to the multichannel radio frequency receiving device, each channel comprises a K / S frequency conversion module and an S / P module, and each K / S frequency conversion module comprises an amplitude limiter, a first amplifier, a first band-pass filter, a first frequency mixer and a second band-pass filter which are connected in sequence; the S / P module comprises a second amplifier, a first phase compensator, a second mixer, a low-pass filter, a third amplifier, a numerical control attenuator, a second phase compensator and a third band-pass filter which are connected in sequence; and the input of the second amplifier is the output of the second band-pass filter. Compared with a traditional multi-channel design, a local oscillator signal is firstly driven and then enters the 0-degree power divider, the amplitude-phase consistency of the multi-channel local oscillator signal is greatly ensured, and the amplitude-phase consistency among multiple channels is greatly improved due to the fact that the digital attenuator and the phase compensation network are additionally arranged in the receiving channel of the secondary frequency conversion.