According to the operating principles of the new generation weather radar receiver system and the measuring method of key parameters of the receiving system characteristic curve, in combination with the abnormality analysis of CINRAD/CC weather radar system abnormal characteristic curve faults, the method for diagnosing and analyzing the abnormal faults of the new generation weather radar receiver is summed up, which is used in the troubleshooting practice of the new generation weather radar receiver characteristic curve faults. The results show that the diagnostic procedure and troubleshooting method are not only fast and effective, but also normative and stable, can be used as reference for the maintenance personnel in the troubleshooting of various weather radar receiver characteristic curve faults.