Method for improving breed by introducing panax quinquefolius DNA into rice

The invention discloses a method for improving a breed by introducing panax quinquefolius DNA into rice. The method comprises the steps of: firstly extracting panax quinquefolius total DNA to prepare panax quinquefolius total DNA solution; secondly planting parent rice, introducing the panax quinquefolius total DNA solution into the parent rice after the rice blossoms and continuing planting to harvest rice containing panax quinquefolius total DNA; thirdly planting seeds of the rice containing panax quinquefolius total DNA, observing the planted rice group in the growth period and selecting a variant with one or a plurality of character differences from the parent rice from the rice group to harvest the variant; and finally planting variant seeds and breeding the improved breed of rice by a systemic breeding method. The method has the advantages that the growth period of the improved breed of rice bred by the method is ahead of time; the number of ears of the single plant, the total seed number per ear, the n