For the purpose of enhancing nitrogen removal efficiency of the high-ammonium fertilizer wastewater, an intermittently-aerated sequencing batch reactor (IASBR) and a continuously-aerated sequencing batch reactor (CASBR) were developed to investigate the performance of partial nitrification for fertilizer wastewater treatment at room temperature (16~26℃). In the steady state, more than 90% of COD was removed. The mean NH+ 4-N removal rate was 93.8% and 87.2%, and the mean nitrite accumulation rate reached at 72.6% and 65.6% in IASBR and CASBR, respectively. Partial nitrification kinetics revealed that the ratio of NH₄⁺-N and NO₂^--N maximum specific nitrification rates were up to 830:1 and 16:1 in IASBR and CASBR, respectively. In order to analyze the improvement effects of intermittent aeration on the performance of partial nitrification, a series of experiments with different non-aeration durations were conducted. It showed that the optimal NO₂^--N accumulation efficiency appeared at 20min non-aeration/40min aeration condition. The non-aeration phase of intermittent aeration was able to enhance the activity expression of AOB, and induce the efficient NH₄⁺-N removal and NO₂^--N accumulation. Moreover, the free ammonia concentration in SBRs (1.3~7.5mg/L) was also one of key parameters for achieving partial nitrification.