A flexible LC wireless humidity sensor based on GO/Mxene is investigated. Its purpose is to compensate for the limitations of a single material and meet the requirements for passive sensing and bending performance in applications. The principle of the sensor is analysed, and a flexible cross finger electrode antenna based on polyimide is designed. The resonant frequency of the antenna is 146 MHz, and the electric field distribution on the antenna is obtained using simulation software. GO/MXene is prepared. The surface morphology and microstructure of GO/MXene are characterized using scanning electron microscopy and energy spectrum analyze, and its structure and constituent elements of GO/MXene are verified. The humidity sensor is fabricated by placing the prepared GO/MXene as a humidity sensitive material at the strongest field strength of the antenna. The performance of the sensor is tested. The results showed that the sensor has high sensitivity. In the relative humidity（RH）range of 20~70% RH, the sensitivity of the sensor reached 90.51 kHz/% RH, and in the relative humidity range of 70~95% RH, the sensitivity reached 651.86 kHz/% RH. At the same time, the sensor has good stability and response time performance, which can monitor human respiration. The Sensor has considerable application prospects in fields such as health detection and robot skin.