Compound feed additive having function of protecting intestinal health of tilapia mossambica and preparation method of compound feed additive

The invention discloses a compound feed additive having the function of protecting intestinal health of tilapia mossambica and a preparation method of the compound feed additive. The additive comprises the following components in percentage by mass: 18.50% of vitamin C, 5.52% of citric acid, 3.12% of phytase, 3.27% of L-glutamine, 0.05% of selenium in protein, 0.45% of vitamin E, 0.05% of vitamin A, 1.50% of cellulose, 0.03% of astaxanthin, and 67.51% of 50% choline chloride. The compound feed additive disclosed by the invention is capable of effectively preventing injury to intestinal tracts of tilapia mossambica caused by oxidization, effectively protecting intestinal health of tilapia mossambica and enhancing the digestion and absorption capacity of tilapia mossambica, and therefore, water body pollution is reduced; energy is saved; the environment is protected; and the economic benefit and the social benefit are increased.