Using ‘Daohuaxiang 2’ as the experimental material, the rotten farmyard manure was applied asbasal fertilizer, and commercial organic fertilizer produced by Shijiazhuang Xiwang Fertilizer Industry TechnologyCo. was topdressed. On the basis of the conventional fertilization, i.e., using 15000 kg/hm² organic fertilizer beforeploughing paddy field, 1875 kg/hm² commercial organic fertilizer was applied at the early tillering stage（June 8）,peak tillering period（June 23）, booting stage（8 July）, full panicle stage（Aug. 5）, respectively. The results showedthat yield increased by 4.33%~12.17% in treatments of topdressing fertilizer from peak tillering to full paniclestage. Compared with the CK, number of panicle per cavity increased by 12.00% when topdressing fertilizer at tiller-ing peak period, panicle grain number increased by 17.00%、19.00% in treatments of topdressing fertilizer at peaktillering period and booting stage, full grain rate was 2.60%、6.53% higher in treatments of topdressing fertilizer atbooting stage and full panicle stage. Effect of topdressing fertilizer at different growth period was summarized, i.e.,topdressing fertilizer at peak tillering period improved effective tiller number, at peak tillering period and bootingstage improved the average grain number per panicle, at booting stage and full panicle stage improved the mixed 1000-grain weight and plump grain rate. Topdressing organic fertilizer at different rice growth stage had no obviousadverse effect on rice quality, but improved the milled rice rate, the head rice ratio, and white grain rate reduced asfertilizing period delayed.