The invention belongs to the technical field of wireless network communication, and specifically relates to a three-dimensional constellation-rotating encryption method based on wireless channel characteristics. The three-dimensional constellation-rotating encryption method based on the wireless channel characteristics comprises the following main steps: (S1) transmitting, by legal communication nodes, detection signals to each other, extracting an equivalent channel phase; (S2) performing, by a transmitting end, three-dimensional mapping on transmission data information to obtain constellation points in a three-dimensional space, utilizing the equivalent channel phase to perform rotating encryption on the constellation points; (S3) performing, by a receiving end, rotating decryption on the transmission data information by means of the equivalent channel phase; and (S4) performing demapping according to a least distance judgment method to obtain data information of the transmitting end. According to the three-dimensional constellation-rotating encryption method disclosed by the invention, the equivalent channel phase is extracted by means of reciprocity of a channel phase response, and a three-dimensional constellation is encrypted by utilizing the extracted equivalent channel phase, so that an eavesdropper cannot demodulate correct bit information, and therefore a safe communication effect can be achieved.