Abstract: For the purpose of the optimum dates, set eight treatments and researched on the effect of different sowing dates on soybean yield and agronomic characters of ‘Guixiadou No.2’ in northwest Fujian Province. The results showed that different sowing dates had great effects on yield and agronomic characters. And earlier planting within the first ten days in June to the last ten days in July was good for higher yield, and the yield with the sowing date of the former twenty days in August was lower. Therefore, in the appropriate sowing, early sowing help to improve yield.