Objective To improve the success rate of insertion of gastric lavage canal in patientswith tracheal intubation. Methods 70 patients with organophosphoms pesticide intoxication who neededgastric lavage after tracheal intubation were randomized into the test group and the control group, 35 easesin each. In test group, lavage canal was inserted through bite block orally and the bedside was raised till 70to 80 in angle. While in the control group, lavage canal was inserted directly through mouth with the posi-tion of hypsokinesis. The success rate of intubation was compared between the two groups. Results One-time success rate was 94.2% in the test group,which was statistically different from that of the control group(37.1%), P < 0.01. The complication of intubation in the test group was also lower than that of the controlgroup,which had statistical difference. Conclusions Through improvement of position to raise the bedsidetill 70 to 80 in angle, the insertion of gastric lavage canal through bite block orally was much better than thenormal one and it is worth applying.