This experiment confirmed that the cause of rupture of the anastomosis in gastroenterostomy did not depend upon the layers of suture The rupture of anastomosis did not occur between the needle suture points if the submucosa was properly sutured, it may occur when the needle suture hole was gradually enlarged and connected each other So, it is reasonable that the distance of suture points should be kept about 0 5cm If the distance is too short or the suture layers are too many, it is not good for the healing of the anastomosis