Based on the meteorological observation quality system, through the process of observation, maintenance, repair and calibration of the new generation weather radar (CINRAD / CD), combined with the experience and skills summarized in the actual observation and technical support work, this paper focuses on some details that are easy to be ignored, reduces the frequency of radar abnormal phenomena, reduces the probability of radar metadata abnormal, and strives to achieve the number of radar According to the reliable, complete, timely and true data, improve the operational quality of weather radar.