The invention discloses high-stability antibacterial antiviral feed for river crabs. The high-stability antibacterial antiviral feed for the river crabs is prepared from corn starch, dextrin, saccharose, wheat, meat meal, fermented blood meal, fish meal, silkworm chrysalis meal, fish oil, flax seed oil, phosphatide oil, peanut oil, lecithin, cholesterol, cellulose, wheat bran, sodium carboxymethyl cellulose, hydroxy propyl cellulose, valine, histidine, lysine, methionine, arginine, threonine, glutamic acid, cysteine, vitamin premixing powder, mineral premixing powder, folic acid, choline, sepia paste, a composite antibacterial agent and a coating material, wherein the composite antibacterial agent is prepared from carboxymethyl chitosan, potassium sorbate, isatis roots, herba andrographitis, herba houttuyniae, galacto-oligosaccharides and vitamin B12. The high-stability antibacterial antiviral feed for the river crabs is high in stability and good in antibacterial and antiviral properties.