Objective: To evaluate the clinic application of suction drainage to prevent salivary fistula after parotidectomy, and select the best time point to remove the drainage according to the drain output and the drain duration.Methods: A cohort of 194 patients with parotid diseases after superficial parotidectomy was assigned into traditional pressure group (Group 1) and entire process suction group (Group 2).Pressure dressing was involved after suction drain removed in Group 1, while entire process suction was fixed in Group 2.The relationship of the output, duration and salivary fistula was also analyzed.Results: The traditional occurrence of salivary fistula of the pressure groups was 11.6 ％, and the rate of the entire process suction groups was 15.5 ％.No statistical significance was found between the two groups (P＞0.05).In the group 2, significant correlation of the drain duration and salivary fistula was not found (P＞0.05), however the drain output of [0～20) ml and [20～30) ml resulted in the different rates of the salivary fistula related to postparotidectomy.