The invention discloses a premix feed for promoting development of ovary of a laying hen. The premix feed is prepared from the following components in parts by weight: 150-200 parts of calcium hydrophosphate, 240-300 parts of stone meal, 40-60 parts of table salt, 20-40 parts of sodium sulfate, 15-20 parts of choline, 40-50 parts of compound microelements, 8-10 parts of compound vatimins, 10-20 parts of lysine, 25-30 parts of methionine, 150-250 parts of bone meal and 40 parts of an additive, wherein the additive is prepared from the following raw materials in parts by weight: 10 parts of soy isoflavone, 6 parts of calcium formate, 5 parts of lecithin, 4 parts of probiotics, 3 parts of phytase, 2 parts of an complex enzyme preparation, 1 part of chromium picolinate, 2 parts of VE, 2 parts of VC and 5 parts of Chinese herbal medicines; the Chinese herbal medicines are prepared from the following components in parts by weight: 0.5 part of ligusticum wallichii, 0.5 part of angelica sinensis, 0.5 part of caulis spatholobi, 0.5 part of radix sophorae flavescentis, 0.5 part of elecampane, 0.5 part of radix paeoniae alba, 0.5 part of codonopsis pilosula, 0.5 part of astragalus membranaceus, 0.5 part of acanthopanax and 0.5 part of leonurus. The feed disclosed by the invention is rih in nutrition, so that intake of nutritional ingredients of the laying hen in a special period from 90 days to 130 days, and moreover, the immunity of the laying hen is improved, and the death and culling rate of the lay hen is reduced.