Abstract: The quality of quasi-global, near-real-time, TRMM-based precipitation estimates have been tested by automatic weather stations rainfall record in Guangdong Province, during the 3 tropical cyclones landfall periods in 2002. Results show that they have good relationship and the TRMM product can reveal the TCs 3-h temporal rain distributions. The temporal and spatial distributions of the TCs rain rate have been analysed, and the large scale circulation environment of these TCs have also been discussed. Results show that the radial distributions of the rain bands are changeable during the TCs landfall periods. Besides the low level moisture flux transmission and terrain, the inner region rain bands of TC Kammuri and Vongfong are weakened by the intensification of their outer region rain bands, that is similar to the former observation and research.