Typhoon Doksuri (2305) is the second strongest typhoon landing in Fujian from 1949 to September 2023, causing extreme heavy precipitation in Fujian. In this paper, the main characteristics of the extreme precipitation in Fujian are analyzed using multi-source observation data such as dual-polarization radar and FY-4A satellite data. It is found that the two obvious precipitation stages are caused by typhoon eyewall/inner spiral rain band and outer spiral rain band, respectively. The meso-β scale convective cloud in the eyewall of Typhoon Doksuri is mainly characterized by large raindrops after landing. The convective cloud splits, goes into the inner spiral rain band, and organizes into a linear convective system, with large raindrops of higher number density causing extreme hourly rainfall. After Typhoon Doksuri moves out of Fujian, the mesoscale convective system along the outer spiral rain band continuously affects the coastal areas of Fujian through the train effect, causing extreme precipitation. The high-concentration of small raindrops is the main cloud microphysical feature. The spatial distribution of precipitation is closely related to the topography such as Jiufeng Mountain and Daiyun Mountain. The trumpet-shaped topography of sea-land interface contributes to the forming of the extreme precipitation center.