Abstract: Pass to expect to sow seeds to experiment separately, make sure the river set to infuse main cash crop sunflower of area the best sow seeds period, and according to to should the weather data, adopt related analysis with return to return an analytical method, make sure sunflower feat sow seeds the agriculture weather index sign, build up sunflower feat dibble a period forecast.The result show,that sow seeds more early, the seedling expect and grow a period more long, accumulate also more high;The edible sunflower is feat to sow seeds the agriculture weather index sign to pass for the air temperature stability 5 ℃ first day, it is feat to sow seeds scope on April 6th ～ April 30th, the oil uses sunflower feat sow seeds the agriculture weather index sign to pass for the air temperature stability 10 ℃ first day, it is feat to sow period scope on April 19th ～ May 16th.