The invention relates to a fattening pig feed for improving the pork quality. The feed comprises the following components in percentage by weight: 72%-75% of corns, 10%-13% of 46.5% bean pulp, 1%-6% of wheat bran, 3%-7% of tea leaf powder, 1.2%-1.5% of bean oil, 1%-1.4% of stone powder, 1.2%-1.4% of calcium hydrogen phosphate, 0.3%-0.6% of salt, 3%-4% of premix, 0.2%-0.3% of lysine, 0.1%-0.2% of methionine and 0.1%-0.2% of threonine. Compared with the prior art, the feed is prepared by drying branches and leaves cut from tea trees, performing conventional or superfine grinding to prepare the tea leaf powder, and adding the tea leaf powder into the fattening pig feed instead of the bran according to a certain ratio; the prepared feed contains not only special nutritional ingredients such as protein, fat, carbohydrate and the like in the tea leaves but also medicinal ingredients such as caffeine, tea polyphenol, lipopolysaccharide, aromatic compounds and the like, and can effectively promote the growth performance of a fattening pig, enhance the anti-stress capability and improve the quality, flavor and mouth feel of pork.