The invention relates to a method for reducing the acidity of acetate. The method comprises the following steps: carrying out an esterification reaction of raw materials comprising acetic acid and lower fatty alcohol in a loop composed of an esterification kettle and a reboiler by treating concentrated sulfuric acid as a catalyst; allowing a gas phase material steamed after the esterification reaction to go through an acid trap having a polytetrafluoroethylene inner liner, carrying out mass transfer exchange of the obtained gas phase material and a tower bottom liquid from the bottom of an esterification tower in a ceramic filler layer for washing off most acetic acid and most sulfuric acid entrained by a gas phase material flow; connecting different gas phase material flows discharged from the upper portion of the acid trap to feeding ports at different positions of the esterification tower through the valve combination, and carrying out separation and subsequent refining in the esterification tower to reduce the acidity of the acetate. The acetate obtained through adopting the method accords with product acidity requirements of corresponding product standards.