The invention discloses a diet starch source combination capable of improving health of intestinal tracts of piglets. The ratio of amylose to amylopectin is 0.48, so that the concentration of total short chain fatty acids, particularly the concentration and the molar ratio of butyrate, of contents in cecum and colon of a piglet can be increased, and accordingly maintaining of completeness and functions of enterocyte of hindgut of the piglet is facilitated. After the piglet is fed by feed containing the amylose and the amylopectin with the ratio of 0.48 for a long time, the gastro-intestinal morphology and the intestinal enzyme activity of the piglet can be improved, the height of intestinal villus is increased, the depth of a crypt is increased, accordingly, growth and development of the small intestine of the piglet can be promoted, and the gastro-intestinal morphology structure is improved. As a starch source with the ratio of the amylose to amylopectin to be 0.48 is used as a daily feed energy source, health of the intestinal tracts of the piglet is possibly facilitated, and development of later-period production performance of the piglet is also facilitated.