The invention provides a pig concentrated efficient breeding feeding mode suitable for northwest regions and a pig feeding system suitable for the northwest regions and relates to the technical field of feeding. The method includes that different concentrate products are fed at different stages: at a piglet stage, powdery feed and granular creep feed are combined, the powdery feed is high in palatability, and the piglets are quick in feed acquaintance, stress is small after weaning; the granular feed is high in intake, little in waste and high in subsequent growing speed; at a growing and fattening stage, according to pig growing characteristics, feeding is performed according to stages and varieties by studying pig nutrition needs. Low-protein daily ration is adopted, various amino acids are balanced, and concentrate nutrition index and preparation proportion are designed reasonably with reference to convenience in purchasing corn and bran raw materials in the northwest region, so that nutrition needs can be met better, waste of nutritional ingredients in the feed can be reduced, the nutritional ingredients of the feed are ensured to be fully digested and absorbed, environment pollution degree and feeding cost of farmers can be lowered, and economic benefit of pig farms can be increased.