The invention relates to a method for raising seedlings out of sweet potato true seeds through nutritive bags and belongs to the technical field of seedling raising of the sweet potato true seeds.The method comprises the specific steps of 1, selecting the position of a seed bed; 2, placing the seeds into the nutritive bags, and densely arranging the nutritive bags; 3, selecting sprouting sweet potato true seeds subjected to pretreatment, hand-sowing the sprouting sweet potato true seeds into the nutritive bags, watering the sprouting sweet potato true seeds thoroughly, and covering the sprouting sweet potato true seeds with a thin film; 4, after the seedlings grow fully, removing the film at nightfall or on a cloudy day; 5, on the third to fifth day after the seedlings grow fully, applying a seedling raising fertilizer for the first time, wherein the nitrogen concentration is 300 mg/L, and applying the fertilizer another time seven days later; 6, on the 30 to 40 day after the seeds are sowed, in other words, the strong seedling standard is reached, conducting transplanting with soil.By means of the method for raising the seedlings out of the sweet potato true seeds through the nutritive bags, the germination rate reaches 92% or above, the emergence rate reaches 100%, the seedlings can grow fully in five days, the seedlings grow consistently, the root system is robust, quality of the raised seedlings is high, the adaptive capacity to an acquired environment is great, operation is simple, seedling raising time is flexible, at the later stage, it can be selected to culture the seedlings at site till the seedlings get mature, harvesting is conducted and furthermore the variety is subjected to breeding according to the conditions, the harvest yield of excellent strains is increased, and time for excellent variety breeding is shorted.