There is big rain attenuation when the XBand Dualpolarization weather radar observes heavy precipitation, as the phase parameter of dualpolarization has little attenuation, so it can be used for correcting the reflectivity. The selfconsistent algorithm and 〖WTBX〗K〖WTBZ〗DP method are two kinds of attenuation correction algorithms that are applied relatively frequently. Both methods use differential parameters to achieve attenuation correction. The selfconsistent algorithm is difficult to achieve, but it can adjust the correction coefficient according to different precipitation types, while the 〖WTBX〗K〖WTBZ〗DP method cannot be realized. In this paper, the 〖WTBX〗K〖WTBZ〗DP complexclassification method is proposed, which is easier to implement, based on the selfconsistent algorithm and 〖WTBX〗K〖WTBZ〗DP methods. We complete the attenuation correction by three methods respectively, and then compared and analyzed the correction effect, also compared with the SBand radar. The reflectivities before and after correction are compared with the ground precipitation observation data. The results show that the corrected reflectivity is more suitable for precipitation observation and inversion.