The invention relates to a growing-finishing pig composite pre-mixing feed, belonging to the feed field, comprising: amino acid additive, inorganic trace element and organic trace element, vitamin additive, magnesium sulfate, bean pulp, functional additive, wherein the organic trace element comprises organic chrome, organic selenium, the amino acid additive comprises lysine and threonine, the functional additive comprises cysteine hydrochloride coated by cyclodextrin, dihydropyridine ester, enzyme preparation, probiotics. The feed can increase the digestion and absorption of nutritive materialand daily gain and feed utilization rate, reduce marketing period; improve feed efficiency, reduce feed conversion ratio (the feed conversion ratio of the common feed is 0.2-0.4), greatly save the cultivation cost; increase muscle lipid content and meat flavor; reduce drip loss and improved meat taste.