The invention discloses a piglet fattening feed for improving pork quality and a preparation method thereof. The feed comprises following raw materials, by weight, 300-400 parts of corn flour, 70-80 parts of fish meal, 50-60 parts of elm seed powder, 30-40 parts of pinus massoniana leave powder, 7-10 parts of gnetum montanum powder, 40-50 parts of beef tripe, 10-15 parts of sesame oil, 0.1-0.2 parts of chilli, 0.5-1 parts of salt, 1-2 parts of Chinese rice wine, 2-3 parts of rice vinegar, 25-30 parts of black rice, 3-5 parts of lotus leaf powder, 5-6 parts of red date, 3-4 parts of rock candy, 1-2 parts of matricaria recutita, 1-2 parts of dried rehmannia root, 2-3 parts of eucommia ulmoides leaves, 2-3 parts of radix isatidis, 1-2 parts of cyrtomium fortunei and 15-20 parts of a phagostimulant, The feed is rich in nutrition, can promote appetite of piglets, can enable the piglets to be healthy and strong and to be free of diseases, is short in fattening period, is high in fattening efficiency, can significantly improve pork quality, and enables pork to be compact, to be red in color and to be delicious in taste.