Since the birth of radio, radio has been one of the first important electronic applications. It has developed into superheterodyne channel selection. The form of broadcasting has always occupied one frequency band. When the number of stations reaches a certain number, it cannot be increased any more. The modulation, reception and transmission of digital radio multi-channel signals are modulated twice with two-dimensional digital. A digitally modulated stereo radio that transmits radio multi-channel signals at a single frequency can transmit 31 sets of programs at a time while ensuring better sound effects. Due to the single frequency of the receiving part, two high-precision circuits such as the channel selection tuning circuit and the superheterodyne mixing detection circuit can be reduced. Digital decoding relies on two sets of the most primitive counters and memories, which is conducive to the integration of the whole machine into a piece with low integration. The integrated circuit effectively utilizes resource allocation and achieves environmentally friendly utilization of frequencies. Due to the unique convenience of broadcasting, it is a rare and necessary supplement for life and entertainment.