Abstract: Radar and communication integrated on the electronic war platform is an effective method to reduce their volume, electromagnetic interference. Following the principle of signal sharing, the system of integrated radar and communication is presented based on LFM signal of same frequency modulation rate and different initial frequency. Under the premise of not affecting the radar performance, the system can transmit multi-binary information by single chirp singal excellently. The performance of communication based on directional radar antenna is assessed in terms of bit error rate and thoughput rate. Finally, the resolution ability of initial frequency and the capability of demodulation of integrated system are analyzed. The simulation result shows that the proposed integrated system has lower SER and higher robustness, and can satisfy the requirements of transmitting the mass data.