The invention relates to an environment-friendly efficient compound feed for cobias, which belongs to the field of fish feed and a preparation method thereof. The environment-friendly efficient compound feed for the cobias consists of the following raw materials in percentage by weight: 20 to 30 percent of steam fish meal, 30 to 49 percent of fermented soybean meal, 3 to 6 percent of peanut meal, 3 to 5 percent of beer yeast powder, 2 to 4 percent of sepia paste, 15 to 20 percent of strong flour, 3 to 5 percent of shrimp shell powder, 1 to 2 percent of vegetable oil, 1 to 2 percent of fish oil, 1 to 2 percent of lecithin, 0.5 to 1 percent of composite mineral, 0.3 to 0.5 percent of vitamin complex, 0.5 to 1.5 percent of choline chloride, 0.1 to 0.2 percent of lightyellow sophora root, 0.1 to 0.2 percent of licorice, and 0.1 to 0.2 percent of plantain herb. The environment-friendly efficient compound feed has a good palatability, is easy to ingest, digest and absorb, and reduces feed wastes; by using plant protein sources to replace part of animal protein sources, the emission of nitrogen and phosphorous is reduced, and the feed cost is reduced; the feed coefficient is low and the survival rate is high; the feed is balanced in nutrition and can prevent fatty lever, improve body color and ensure the health of fishes and the freshness of meat quality; and the feed has good stability in water and is difficult to pollute the water quality of a culture water body.