By means of 3D visualization technology, the 3D surface reconstruction algorithm and the 3D body reconstruction algorithm are introduced into the analysis of weather radar echo images, and in combination with the weather radar 3D networking mosaic products developed by the State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Science, the 3D display of the typhoon “Sepat” is realized. The results indicate that compared with single radar products, the 3D mosaic products have wider coverage in time and space; compared with 2D display, 3D Visualization has greater advantages in analyzing the spatial distribution of radar echoes, especially in analyzing the structure of radar echoes. The 3D visualization technology combined with 3D mosaic products provides a more comprehensive way for radar echo analysis.