The invention discloses a multiple-channel radio-frequency signal adaptation system in the technical field of digital signal processing, and the system comprises an automatic gain control module, a direct frequency conversion module, a digital-analog conversion module, a clock control module and a digital signal processor, wherein the digital signal processor is composed of a branching unit, N paiallel and independent control signal processing branches and a combiner. The system provided by the invention has the advantages of simple structure, and good phase noise index; and the precision of the radio-frequency delay is set to 0.025 microseconds, the range of the radio-frequency delay is set to second level, multiple channels can work independently, and any channel can be set to independently open and close.