Abstract: To address the problem that the radar and communication performance of radar communication integrated signal cannot be taken into account, OFDM-CPM-LFM radar communication integrated signal is proposed. Firstly, the linear frequency modulation (LFM) signal is modulated by continuous phase modulation (CPM) to reduce the signal side flap and improve the radar detection capability, and the integrated signal performance is balanced under the dynamic modulation index; then the orthogonal frequency division multiplexing (OFDM) technology is combined to improve the communication transmission rate, and the integrated signal performance is balanced by the dynamic modulation index. OFDM to improve the communication transmission rate, and reduce the influence of interference by increasing the cyclic prefix and suffix to ensure the communication performance; finally, the integrated signal performance is analyzed by using ambiguity function and bit error rate(BER). The simulation results show that the proposed integrated signal can achieve efficient communication while ensuring the radar detection performance, and the BER can reach below 10⁻⁵ at 10 dB SNR.