To break the technical bottlenecks of traditional channelized receivers, including instantaneous operating bandwidth, processing speed, and scale, this paper proposes a passive channelization method based on the high-accuracy arrayed waveguide grating. Narrow-band channel division of RF-modulated optical signals is realized using an ultranarrow passband arrayed waveguide grating. The designed and prepared optical channelization chip has a stable performance. The optical insertion loss of the channel is approximately 11 dB after packaging, and the optical isolation between the adjacent channel is greater than 16 dB. The build channelization system demonstrates multichannel channel division with the 10 GHz bandwidth of the ultra-wideband RF-modulated optical signal. The system is compact, which can greatly reduce the complexity of the channelization system. In addition, it can achieve all-optical interconnection with the microwave photon frontend and backend. The insertion loss of the microwave photonic link can be significantly reduced, and the sensitivity of the receiving system can be improved.