The attenuation of Xband dual polarimetric radar is the main problem in application of echo strength and differential reflectivity factor (〖WTBX〗Z〖WTBZ〗Hand 〖WTBX〗Z〖WTBZ〗DR). It has a strong impact on the radar detecting precision and rainfall estimation. 〖JP2〗In consideration of the quality problem of 〖WTBX〗K〖WTBZ〗DP in the low SNR situation, we used four kinds of attenuation correction methods: 〖WTBX〗Z〖WTBZ〗H-〖WTBX〗K〖WTBZ〗DP and three kinds of segmented ZPHI methods. To have a better judgment of the Foshan Xband radar correction results of different methods, we used the data of the Guangzhou Sband radar as standards. But due to the different position information of two radars, the Sband radar data must be processed by coordinate conversion and interpolation processing. Then we got data pairs with same elevation, azimuth and range. After qualitative and quantitative analysis, we find that ZPHI is superior to 〖WTBX〗Z〖WTBZ〗H-〖WTBX〗K〖WTBZ〗DP in relative deviation and correlation coefficient.