Abstract: Modern radar signal is developing towards multi-format, multi-band, and large bandwidth, which poses a greater challenge to radar signal detection in electronic warfare, and requires receivers with large instantaneous bandwidth, wide spectrum coverage, and high spectrum resolution ability. For the advantages of low loss, large bandwidth, anti-electromagnetic interference, and simple structure, microwave photonic technology meets the requirements of ultra-wideband channelized receivers. Starting from the needs and challenges faced by channelized receivers, typical technical schemes of microwave photonics channelized receivers are briefly reviewed, and current research trends of microwave photonics channelized receiver technology are introduced.