The invention relates to a Chinese herbal medicine additive for preventing abortion of sows and a pig feed containing the Chinese herbal medicine additive, belonging to the technical field of medicines. The additive comprises the following components in parts by weight: 30-90 parts of codonopsis pilosula, 10-30 parts of largehead atractylodes rhizome, 30-90 parts of poria, 10-30 parts of himalayan teasel root, 10-30 parts of mistletoe, 10-30 parts of semen cuscutae, 6-18 parts of donkey-hide gelatin, 10-30 parts of fried folium artemisiae argyi, 6-18 parts of fructus amomi villosi, 10-30 parts of perilla stem, 10-30 parts of parched eucommia, 10-30 parts of morinda officinalis, 15-45 parts of prepared rehmannia root, 15-45 parts of angelica sinensis, 10-30 parts of fragant peony, 10-30 parts of fried scutellaria baicalensis, 10-30 parts of fried cortex phellodendri, 30-90 parts of parched medicated leaven, 30-90 parts of parched hawthorn fruits, 30-90 parts of calcined os draconis, 30-90 parts of calcined oyster and 6-18 parts of liquorice. According to the Chinese herbal medicine additive, the constitution of pregnant sows can be obviously improved, the resistances to various pathogenic factors are enhanced, and the abortion rate of the pregnant sows is well reduced.