Combining the conventional sounding data with from radar, satellite, and the automatic weather station data, an analysis is made of the surface operation drills of artificial rain reduction during the 11th Chinese National Games between 19 and 20 September 2009. It is a relatively stable process with small to moderate rainfall, which provided good conditions for the experiments of artificial rain reduction. Based on the two excessive seeding experiments in at the night of 19 September and the morning of 20 September, the contrast is conducted between the radar data before and after operation. At the same time, the physical examination for the effect of weather modification is carried out. The results proved satisfactory, which can provide useful references for further weather modification experiments.