The invention belongs to the field of agricultural stockbreeding machines and in particular relates to an automatic precise feeding device for breeding pigs in lactation. The system comprises a material storage tank (10) and a horizontal conveying pipe (5) connected with the material storage tank (10), wherein the horizontal conveying pipe (5) is provided with a chain scraper conveying device and is connected with a plurality of vertical conveying pipes (8) in parallel. The lower ends of the vertical conveying pipes (8) are led to a manger (3). The device aims at the individual situations of the suckling breeding pigs in the reproduction period and the feeding requirements of the breeding pigs in lactation, realizes precise feed putting on time and at fixed amount and achieves the aim of precise feeding.