Abstract: Due to the frequent leakage of information caused by new attack methods such as quantum computing in the communication process of power information, a secure encryption method for power communication information based on quantum cryptographic public key algorithm is proposed. Eliminating redundant data in the original power communication information through wavelet transform algorithm, and securely encrypting the de redundant power communication information data based on CRYSTALS-Kyber public key encryption algorithm in post quantum cryptography. The experimental results show that the design method can significantly improve the security and encryption efficiency of power communication information, meeting practical encryption needs.