The invention provides a multifunctional nasal 
feeding tube and a nasal feeding 
system. The multifunctional nasal 
feeding tube is characterized in that a tube body of the nasal 
feeding tube is internally provided with a non-return valve; an 
airbag is arranged at the outer side of the tube body of the nasal feeding tube; the 
airbag is connected with a pressurizing 
airbag through an air guiding tube. The non-return valve can be used for preventing 
nutrient solution in the nasal feeding tube from reflowing; the airbag at the outer side of the tube body of the nasal feeding tube is inserted in the position of stomachus cardiacus; after the inflation of the pressurizing airbag, the situation that gastric contents at the outer side of the nasal feeding tube are sucked into a 
lung by mistake due to reflow can be effectively prevented. According to the multifunctional nasal feeding tube and the nasal feeding 
system, aspiration complications caused by enteral 
nutrition support therapy through nasal feeding can be prevented specifically; the 
lung infection, severe pneumonia, even 
asphyxia caused by aspiration progress are effectively reduced, and the death rate is lowered. The multifunctional nasal feeding tube and the nasal feeding 
system can be widely suitable for popularization and application of clinical enteral 
nutrition support therapy. Moreover, the nasal feeding tube is further provided with an 
injector joint and a 
drug administration joint, so that the 
drug administration operation is conveniently performed on a patient who cannot swallow drugs independently. A feeding 
material supply system is arranged in the nasal feeding system, nutrients can be continuously fed to the patient after the connection with the nasal feeding tube, and the feeding efficiency is improved.