In the distribution of main syndromes, the case numbers were sequenced as the dampheat of Dachang syndrome > the yang deficiency of Pi-Shen syndrome > the Gan-depression and Pi-deficiency syndrome > the deficiency of Pi-qi syndrome > the blood stasis of the intestine meridian syndrome > the deficiency of blood and yin syndrome. The frequency of intestinal mucosal manifestations more than 50% covered mucosal damage, abnormal mucosa membrane color, congestion, edema, erosion, ulcer, pus tongue fur, and obscure or disappeared blood vessels. The edema, erosion, and ulcer occurred more in the damp-heat of Dachang syndrome, followed by the yang deficiency of Pi-Shen syndrome and the Gan-depression and Pi-deficiency syndrome (P < 0.05, P < 0.01). Polypi, abnormal enterokinesia, grainy occurred more in the damp-heat of Dachang syndrome and the Gan-depression and Pi-deficiency syndrome (P = 0.010). Shallower plica or disappeared sacculations of colon occurred more in the yang deficiency of Pi-Shen syndrome and the damp-heat of Dachang syndrome (P = 0.002). The mucosa bridge occurred more in the yang deficiency of Pi-Shen syndrome and Gan-depression and Pi-deficiency syndrome (P = 0.280). Fragility or contact bleeding occurred more in the damp-heat of Dachang syndrome, the deficiency of Pi-qi syndrome, and Gan-depression and Pi-deficiency syndrome (P = 0. 045). Pale blood of the intestinal hemorrhage occurred more in the deficiency of Pi-qi syndrome while dark blood occurred more in the damp-heat of Dachang syndrome (P = 0.017). Pus tongue fur occurred more in the damp-heat of Dachang syndrome, the yang deficiency of Pi-Shen syndrome, and the Gan-depression and Pi-deficiency syndrome. White pus tongue fur occurred more in the yang deficiency of Pi-Shen syndrome while yellow pus tongue fur occurred more in the damp-heat of Dachang syndrome (P < 0.001). Mucus occurred more in the yang deficiency of Pi-Shen syndrome, the Gan-depression and Pi-deficiency syndrome, and the deficiency of Pi-qi syndrome (P = 0.012). Narrow enteric cavity or intestinal canal fibrosis, lead pipe like manifestations occurred more in the blood stasis of the intestine meridian syndrome (P = 0.001). Atrophic mucosa occurred more in the blood stasis of the intestine meridian syndrome and the deficiency of blood and yin syndrome (P < 0.001).