A wearable and flexible NFC tag antenna is fabricated by using gallium-based liquid metal as flexible conductive material. Through theoretical, simulation and experimental analysis, the NFC tag antenna designed has good flexibility and high bandwidth. Its inductance change and resonance offset degree are very small under large stretching and bending deformation, and the working stability is well. Different from traditional NFC antenna, the antenna designed has good flexibility and stretchability, which can be gently attached to the surface of human skin. The NFC tag prepared by this antenna can communicate wirelessly at the operating frequency of 13. 56 MHz. The maximum communication distance is about 3. 36 cm, and the maximum communication distance after contacting with human wrist skin is about 3. 12 cm. Due to its unique advantages, the flexible NFC tag antenna fabricated has great potential applications in information exchange, personal health data monitoring and wearable biosensors.