The weather radar 3D mosaic products developed by State Key Laboratory of Severe Weather of Chinese Academy of Meteorological Sciences has put into th e operational trail in Beijing, Hebei and Guangdong province. Compared with one single radar products, the 3D mosaic products have wider coverage in time and sp ace, and they also have provided a powerful platform for application of weather radar products. But in the processing of radar 3D mosaic, the difference of inte nsity and positioning in different radar will greatly influence the effect of 3D mosaic. This article takes Beijing, Tianjin, Zhangbei, Shijiazhuang radar as a n example respectively, analyzes the intensity and localization uniformity among different ra dars. The result indicated that there is greatly consistency of detection positi on in four radars. Compared with Beijing, Shijiazhuang and Tianjin radars, the i ntensity has deep attenuation in Zhangbei radar. The analysis provided a good su pport for the further enhancement in the accuracy and uniformity of 3D mosaic.