An X-band dual-polarization phased array radar (XPAR) network is being set up in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) to improve observation accuracy and enhance low-altitude observation capability. In order to solve the raindrop attenuation problem of X-band radar and meet the requirements of observation and networking, self-consistent algorithm for attenuation correction is introduced and localized. The results show that the correction amplitude of reflectivity factor reaches 6 dB, and the negative 〖JP2〗value of differential reflectivity is also effectively constrained. Scatter analysis and quantitative statistical results of adjacent XPARs show that the spatial and intensity distributions of the two groups of data after quality control have a high consistency. Compared with S-band radar data which are taken as the truth value, the XPAR intensity of reflectivity factor is weak before attenuation correction, but enhanced to the equivalent strength of the S-band radar after correction, which is stronger locally and the accuracy is significantly improved. Differential reflectivity is corrected to some extent, the scatter distribution of corrected differential reflectivity and reflectivity factor is more concentrated and related coefficient is higher. It can be seen that this algorithm solves well the rain area attenuation problem of X-band phased array radar, and provides early data quality assurance for the promotion and application of X-band phased array radar network data and product development in the GBA.