The invention discloses a process for producing resorcinol by continuously hydrolyzing m-phenylenediamine. The devices adopted by the process include a pipe mixer, a heat exchanger and a tower reactor, wherein baffle plates are distributed in the tower reactor from top down and the external wall of the tower reactor is provided with a heating pipe coil. The process comprises the following steps: 1, continuously preparing a hydrolysis raw material by using the pipe mixer to form homogeneous aqueous solution of m-phenylenediamine sulfate; 2, preheating the aqueous solution of m-phenylenediaminesulfate to 225 to 245 DEG C by the heat exchanger, continuously filling the aqueous solution of m-phenylenediamine sulfate to the tower reactor from the top part of the tower reactor, keeping the reaction and retention time of the reaction material in the tower reactor between 120 and 240 minutes, and performing continuous hydrolysis reaction; and 3, performing post-processing step of the hydrolysis reaction solution obtained by the hydrolysis reaction to obtain the resorcinol. The process has the characteristics of high equipment efficiency, short production period, high product yield, stable product quality and simple and convenient process control.