Abstract: Dual-polarization radar plays a crucial role in retrieving precipitation phases and microphysical characteristics . As the operational radar model deployed in Xinjiang network , the accurate detection of reflectivity factor Z and differential reflectivity Z DR by the CINRAD/CC-D new-generation dual-polarization weather radar is of great significance . A calibration experiment for radar Z and Z DR was conducted with a metal ball suspended by an Unmanned Aerial Vehicle (UAV) , and the Xinjiang Qitai dual-polarization radar was used to perform sector scans , high-elevation scans , and fixed-point scans on the metal ball . The results show that when a metal ball with a diameter of 30 . 48 cm and a separation distance of 100 m from the UAV is used , the absolute mean deviation of Z is 0 . 32 dB , the absolute maximum deviation of Z is 0 . 79 dB , and the absolute minimum deviation of Z was 0 . 06 dB . Then , for Z DR , the absolute mean value of is 0 . 14 dB , the absolute maximum deviation is 0 . 23 dB , and the absolute minimum deviation is 0 . 07 dB . These indicators of both Z and Z DR all essentially meet the technical requirements for radar calibration . The positioning method and data acquisition approach for the metal ball used in this experiment effectively meet the requirements of the metal ball calibration test. Moreover , the metal ball method can successfully calibrate weather radar reflectivity factor Z and differential reflectivity Z DR .