The invention discloses a preparation method for a low-carbon environment-friendly shrimp feed, belonging to the technical field of feed preparation. The preparation method comprises the following steps: soaking cooked orange peels with toothpaste; then subjecting the soaked orange peels to insolation and drying and preparing powder from the dried orange peels; preparing a mixed wet material from soybean meal, vinasse, pig blood and the like and feeding earthworms with the mixed wet material; subjecting the earthworms and the mixed wet material to refrigeration and ball milling successively; drying a ball-milled wet material obtained in the previous step and mixing the dried material with the powder, corn starch and the like; and preparing feed granules by using a pelletizer, drying the feed granules and bagging the feed granules for storage so as to obtain the low-carbon environment-friendly shrimp feed. The preparation method effectively overcomes the problems of too high protein content and severe pollution to a water environment of conventional shrimp feeds; and the prepared shrimp feed can fully meet demands of shrimps for nutrients, effectively improves the feed intake of the shrimps, reduces discharge of ammonia nitrogen and phosphorus and realizes sustainable development of the shrimp breeding industry.