We obtained the hybrids through the full red body color of the colorful carps hybridizing with the Jian carps by the reciprocal cross.We studied the growth and development of the digestive tract of the two kinds of hybrids comparatively to provide the theoretical basis for the production and research of the distant hybridization of the colorful carp and Jian carp.This study respectively chose 50 from the Jian carps, the colorful carps, the F1 hybrids of the colorful carp(♂) and the Jian carp(♀) and the F1 hybrids of the colorful carp(♀) and the Jian carp(♂).They were named group 1, group 2, group 3 and group 4.The fish in each group had similar age in days. Each group chose five fish which had the similar weight to measure the intestines length and intestines weight and then made intestinal biopsies.And we calculated the indexes of intestinal weights and lengthes and the heights of duplicatures and other data.We disposed data by the Excel and analyzed data by the SPSS (17.0).Results showed that the rate of digestion of the F1 hybrids of the colorful carp(♂) and the Jian carp(♀) were higher than the rate of digestion of the F1 hybrids of the colorful carp(♀) and the Jian carp(♂) and that the rate of digestion of the two kinds of hybrids is higher than the rate of digestion of the two kinds of parental generations.And this reflected hybrid vigour.