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Through analyzing the principles and methods for measuring the transmitting power of the pulse Doppler Weather Radar, the key elements and their effects, as well as the measurement reference, are summarized. Combining with the application of the Sband Pulse Doppler Weather Radar, the scientific and normative methods, skills, and key technologies for measuring the radar transmitting power are studied. The results show that the accuracy of the measuring results is affected by many factors, and can be vastly distorted by nonstandard measuring methods. Therefore, in order to ensure the accuracy of radar examining, testing and calibration, it is important to study the scientific and normative technologies and methods for measuring the radar transmitting power.