Abstract: Aiming at the communication system security risks caused by the characteristics of battlefield wireless network, such as global openness, broadcasting characteristics and real-time mobility, to ensure the safe and effective transmission of messages in the battlefield network, In this paper, combining transform domain communication method with classical encryption method, a secure enhancement scheme based on MP-WFRFT and the Shared channel key is proposed. By establishing the physical layer secure encryption model, the channel detection and Shared key generation methods are given and mixed carrier modulation based on MP-WFRFT multi-encryption parameter is used to distort the signal constellation under the perturbation constellation scheme. Simulation analysis shows that, this scheme can improve the constellation entropy of the signal in the battlefield wireless network. In addition, the bit error rate performance of the system has been greatly improved compared with the previous schemes, it will provide a new scheme for improving the overall performance of battlefield wireless network.