The invention discloses a special compound feed for crabs. The compound feed consists of soybean meal, rapeseed meal, peanut meal, corn protein powder, spray-dried animal blood cells, fish meal, shrimp meal, four, fish dissolving-pulp protein powder, yeast extract, fish oil, soybean lecithin oil, bentonite, monocalcium phosphate, a mildew preventive, mannan oligosaccharide, glycine betaine, a hulling element, methionine, choline, perilla seed extract, a vitamin premix and a mineral premix. The raw materials of the compound feed are stable in source, high in utilization ratio, balanced in nutrient content and relatively low in cost. The preferred fish dissolving-pulp protein powder enhances the feed attraction of the feed. An advanced puffing process is adopted so as to further improve the utilization ratio and water resistance of the feed and reduce waste and water pollution. Meanwhile, an immune nutrition additive is adopted so as to significantly enhance the immune function and anti-stress capacity of the crabs and significantly increase the survival rate. The compound feed is much greener and more environmentally friendly, and efficiency increase is particularly significant in a high-density river crab breeding mode.