Objective To study and explore the clinical effect of saline lavage on patients with acute oral poisoning. Methods From January 2014 to January 2017, 100 cases of patients with acute oral drug poisoning who admitted in the emergency department of our hospital were selected as the research object, the patients were randomly divided into the control group and the observation group by taking digital computer random grouping method, 50 cases in each group, the control group used clean water to lavage, the observation group used saline to gastric lavage, the success rate of rescue, serum sodium concentration, mean arterial pressure and complication rate were compared between two groups. Results The success rate of rescur in the observation group was significantly higher than the control group (P<0.05); after gastric lavage, serum sodium concentration and mean arterial pressure in the observation group had not appear obvious fluctuation, and serum sodium concentration and mean arterial blood pressure in the control group were lower than those before gastric lavage (P<0.05); the incidence of complications in the observation group was significantly lower than that the control group (P<0.05). Conclusion The use of physiological saline for acute oral poisoning patients with gastric lavage, can effectively improve the success rate of rescue, reduce complications, but also to avoid water and electrolyte disorders.