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Beijing Fangshan dualpolarization weather radar’s antenna performance, receiver dynamic range, noise factor, system calibration ability and the consistency of receiving dual channels are tested and analyzed. The minimum values of the antenna gain and cross polarization isolation ratio and the standard deviation values of the dual channels’ differential reflectivity 〖WTBX〗Z〖WTBZ〗DR and differential transmission phase 〖WTBX〗Φ〖WTBZ〗DP are 4473 dB, 361 dB, 002 dB and 026°, respectively and the maximum average value of the dual channel noise coefficient is 202 dB, which all correspond to the index design of the radar system. The differences of dual channels’ dynamic curve characteristics and the consistency of echo intensity calibration performance will adversely affect the quality of radar system detection data. In addition, the differential reflectivity calibration for the dualpolarization weather radar and an actual detecting precipitation weather case are also analyzed.