Abstract: Oat emergence, plant height, dry matter content each growth period and yield under different treatment, using microbial fertilizer seed dressing and reducing the amount of chemical fertilizer, were studied to provide the basis for the promotion and application on oats. Yield under different treatment were significantly different, with the highest yield 4189.5 kg/hm² under treatment C (microbial fertilizer seed dressing and 75% chemical fertilizer). Yield of treatment A (100% chemical fertilizer) and B (microbial fertilizer seed dressing and 50% chemical fertilizer) were in the middle which were 3546 kg/hm² and 3468 kg/hm². The lowest yield was 3064.5 kg/hm² under the treatment D (CK). Therefore, using microbial fertilizer on oat seed dressing not only can improve oat yield, but also can reduce the amount of chemical fertilizer and alleviate the degree of soil compaction.