Abstract: Reviewed the history of weather radar over the past 70 years in China, and the current situation of weather radar support technology at home and abroad is compared, the demand of domestic weather radar support technology is expounded from the development and trend of weather radar calibration, testing and fault diagnosis technology.Standardized and standardized operation methods and processes have been formed in the calibration technology of single-polarization weather radar in China.The consistency of dual channels and polarization isolation are the important indexes of the calibration technology of dualpolarization weather radar.The calibration technology of dual-polarization weather radar is quite mature and the emphasis is on the data quality control in foreign countries.Dual-polarization weather radar calibration technology has been deeply studied in solar method, light rain method, calibration platform (source) method, unmanned aerial vehicle calibration technology in China.Exploration of phased-controlled weather radar calibration technology has great significance to accelerate the development of weather radar system technology and promote the operational application.Weather radar testing and fault diagnosis technology has been developed to the direction of intelligence and remote in foreign.At the early stage, the testing and fault diagnosis technology of weather radar depended on manual work and experience in China.At present, it is facing the alternating period of traditional technology and intelligent diagnosis technology.The weather radar standard output controller system, the weather radar test and fault diagnosis platform both have been developed, making the weather radar system test and fault diagnosis technology leap to a new level:integration, modularization and intelligence in China.The intelligent diagnosis technology based on virtual instrument with software algorithm is used to improve the efficiency and accuracy for weather radar test and fault diagnosis, and the“self-adaptability”and“intelligence”of the system are the main development trends.In the future, with the continuous development of intelligent weather radar technology, the weather radar system becomes solid and intelligent, which will bring new challenges to the calibration, testing and fault diagnosis technology for weather radar.