Abstract: The key technologies of radar and communication integration with high frequency-deviation and low bit-error-rate(BER) are studied in this paper, and its technical principle and realization method have been put forward.Combining pulse compression of phase coding with phase modulation data, the waveform of detection and communication integration is designed.New processing methods, such as four-quadrant baseband selecting&splicing processing and four-quadrant phase coverage, are adopted to quickly detect receive & transmit signal frequency deviation, and to extract baseband signal for pulse compression and data demodulation. Radar and communication integration, recovery of baseband signal, pulse compression, BER of data are simulated and capability boundary is analyzed. Results show that with this technology, multi-address sharing of detection and communication, self-adapting of high dynamic and large deviation of receive & transmit signal frequency, low BER of data communication, low signal processing delay, and hardware resources saving are achieved. The user demand for improvement of spectrum efficiency, high-capacity information transmission, detection and communication integration of high speed and large dynamic targets are satisfied. It is a breakthrough of existing related electronic information technologies at home and abroad.