Nucleotide feed additive for tilapia

The invention discloses a nucleotide feed additive for tilapia. The nucleotide feed additive is characterized in that nucleotide comprises adenylic acid 5'-AMP, cytidylic acid 5'-CMP, guanylic acid 5'-GMP and uridylic acid 5'-UMP in a weight ratio of (0.9-1.5):(0.7-1.2):(1.1-2.0):(0.8-1.5). The nucleotide feed additive has the beneficial effects that the nucleotide feed additive can obviously increase the length of the intestinal tract of tilapia and improve the growth efficiency, feed utilization rate and environment tolerance of tilapia, and at the same time, the non-specific immunity of tilapia is greatly enhanced by adding nucleotide, which have profound significance for the present intensive culture industry of intensive tilapia.