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Objective To apply the long-time passive microwave historical data from Chinese satellites to the study of climate and climate change, this paper focuses on the latest results of recalibration of the historical data of domestic satellite microwave payload, which is a national key research and development plan. Chinese Feng Yun 3 series satellites (FY-3) have accumulated historical microwave remote sensing data of Microwave Radiometer Imager(MWRI), Microwave Temep. Sounder (MWTS) and Microwave Humidity Sounder(MWHS) for more than 13 years from May 27, 2008. And we have completed the launch and operation of four satellites in two batches. During this period, the microwave payload data of FY-3 satellite played an active role in disaster prevention and mitigation and numerical weather forecast assimilation. Method Based on the review of the international satellite borne microwave radiometer historical data recalibration technology, this paper introduces the characteristics of the microwave load of FY-3 satellite, summarizes the common technologies of operational radiation calibration and historical data recalibration, and expounds that the microwave load of FY-3 satellite passes through the whole link radiation transfer simulation of the instrument system. After constructing the radiation correction model under special conditions in orbit, the technical route of rescaling historical data to eliminate the radiation difference between generations based on the international reference load; the basic operational status of FY-3 microwave payload in orbit and the research results of historical data recalibration are introduced. Results The long-time sequence L1 scientific data set of FY-3 microwave generated by recalibration is cross compared with similar international loads. It shows that the RMSE of long-time series brightness temperature data of oxygen absorption channel is 0.77k and the standard deviation is 0.28k; After rescaling the water vapor absorption channel, the optimal RMSE of the long-time series data is 0.80k and the standard deviation is 0.20k; In the window channel, taking the 23.8ghz V polarization channel as an example, the RMSE of the long-time series data after re calibration is the best up to 1.29k and the standard deviation is 0.15k; After calibration, the maximum RMSE shall not exceed 1.5k. Conclusion The microwave load of FY-3 satelliteS has very good radiation consistency with the reference load. The recalibration results of the historical data of FY-3 satelliteS microwave load provide basic support for the subsequent establishment of FY-3 satellite microwave load basic climate data set (FCDR), climate data set (CDR) and climate variable data set (ECV).