The invention relates a placing device for nasointestinal tube under laparoscope, which is designed for patients who need to be placed into the nasointestinal tube under the laparoscope. The placing device for nasointestinal tube under laparoscope consists of a nasointestinal tube, a disposable sterile sleeve membrane, a guide core and a magnetic guide device. The guide core is composed of a guidecore print, a guide wire and a power supply device. An LED light source is arranged on the guide core print, and the position of the tip of the nasointestinal tube can be determined under the laparoscope after the LED light source is turned on. The guide core print is made of a nickel-iron alloy and can be guided by magnetic force to enter the intestinal canal through the pylorus.