The invention discloses a novel fattened pig compound feed and a preparation method thereof. The novel fattened pig compound feed is prepared from the following raw materials in percentage by weight: 35-50 percent of corns, 20-35 percent of puffed peas, 15-40 percent of wheat and 3-4 percent of a premix. According to the digestion physiological characteristic of a fattened pig, the peas, the corns and the wheat, which are high in biological utilization rate, are used as basic feed materials, and synthesized creatine monohydrate is creatively mixed with glucose, D-pinitol and other additives to replace conventional fish meal, so that under a condition of reducing the feeding cost, the lean rate is increased, the growth speed is increased, the digestion absorption rate is improved, and the resistance to pathogens is enhanced; nitrogen emission is alleviated, and the feeding environment is improved. Meanwhile, an advanced puffing technology is adopted, so that the puffing efficiency and the fat digestion rate as well as the palatability of the feed are improved. The novel fattened pig compound feed has the characteristics of high lean rate, stable quality, low cost, high fat digestion rate, high palatability, low excrement pollution and the like and has a high popularization value.