The invention discloses a feed for strengthening bones and muscles of broiler chicken and a preparation method thereof. The feed is prepared from the following raw materials (by weight): 500-600 parts of fresh manioc waste, 1.5-2.5 parts of sodium citrate, 75-78 parts of oat, 4-6 parts of medicated leaven, 25-27 parts of dried black mushroom powder, 18-20 parts of mango, 2-3 parts of walnut kernel powder, 4-5 parts of black rice flour, 7-9 parts of watermelon jam, 3-4 parts of ligusticum wallichii, 2-3 parts of himalayan teasel root, 3-4 parts of egg white, 2-3 parts of anhydrous ghee, 62-65 parts of soybean meal, 34-36 parts of perilla leaf, 27-29 parts of herba leonuri, 45-47 parts of plasma protein powder, 2-3 parts of pomegranate vinegar, 24-26 parts of freshwater shrimp powder, 0.3-0.5 part of salt and 3-4 parts of crab shell powder. The feed has effects of adjusting body function, enhancing immunity, strengthening bones and muscles and the like during breeding process of broiler chicken. By the use of the feed, growth and development of broiler chicken can be promoted, weight gain rate can be increased, digestive function can be improved, and quality of broiler chicken can be improved.