Background: PrematurityÂ isÂ one of the most important problems of recent years, and the number of premature infants is increasing every year.Â Babies who are born prematurely due to defects in the coordination of swallowing, sucking and breathing require mouth tube or nasogastric intubation feeding. Because bolus gavage feeding is more appropriate physiologically and improves the secretion of gastric hormones is more common in neonatal intensive care units. Objective: The primary objective ofÂ theÂ studyÂ is a comparison of twoÂ alternate gavageÂ ways with forceÂ gravityÂ andÂ injectionÂ withÂ syringeÂ inÂ premature infants and findÂ existence differenceÂ and compared with the results of the research have been performed yet. Methods: InÂ this study, gastric residualÂ volume indicatorsÂ collecting method are used.Â TheÂ study used a questionnaire to collect data to measure indicators ofÂ theÂ following tools. Results: Results showedÂ thatÂ both alternate gravity and injection (push) ways,Â complications of gavage (vomiting, aspiration, abdominal distention and necrotizing enterocolitis) had not been seen. Conclusions: Â Based on the results of both currently study of methods in preterm infants feeding have same effectiveness and safety.