Dual-polarization weather radar data quality real-time evaluation method and system

The invention provides a real-time evaluation method for data quality of a dual-polarization weather radar. The real-time evaluation method comprises the following steps: S1, acquiring a base data file of the dual-polarization weather radar; if the base data file is VOL data, executing the following steps S2-S5; if the base data file is PPI data, executing the following steps S2-S3 and S5; s2, echo recognition is carried out; s3, if the base data file belongs to meteorological echoes, calculating a system deviation factor of differential reflectivity, a reflectivity sensitivity factor, a system deviation factor of horizontal reflectivity and a phase correlation quality factor; s4, if the base data file belongs to meteorological echoes, calculating a ground clutter suppression transition factor; s5, if the base data file does not belong to the meteorological echo, calculating a ground clutter suppression insufficient factor; and outputting each calculation result as an evaluation result. According to the metho