The invention provides pure barley pregnant sow feed and a production method thereof. The feed is prepared from, by weight, 40-50 parts of dehusked naked barley, 10-20 parts of husk barley, 2-6 parts of puffed soybean meal, 5-10 parts of wheat bran, 5-10 parts of wheat flour middling, 3-8 parts of beet grain pulp, 3-8 parts of No.3 powder, 3-7 parts of corn distillers' grains, 2-3 parts of soybean oil, 0.1-0.5 part of compound vitamins, 0.1-0.5 part of mineral elements, 0.01-0.1 part of glycanase, 0.01-0.1 part of a complex enzyme, 0.2-0.6 part of lysine hydrochloride, 0.05-0.2 part of threonine, 0.01-0.05 part of tryptophan, 0.05-0.2 part of choline chloride, 0.01-0.1 part of sodium bicarbonate, 0.2-0.5 part of table salt, 0.5-3 parts of rock flour and 1-3 parts of calcium monohydrogenphosphate. According to the pure barley pregnant sow feed and the production method thereof, reasonable diet fiber is supplied to sows by adopting the method that the dehusked naked barley and the husk barley are cooperatively used, the usage amount of barley in feed is increased by adopting a barley dehusking technique, the feed cost is reduced, and the reproductive performance of the sows and the growth performance of piglets have the obvious advantages.