The utility model relates to the technical field of automobile braking systems, in particular to an auxiliary device for an electronic parking acoustic test. An auxiliary device for an electronic parking acoustic test comprises a bottom plate, a base, a supporting plate and a flange, and is characterized in that the center of the bottom plate is connected with the bottom end of the base, the top end of the base is connected with the supporting plate or a mirror image supporting plate, and the supporting plate and the mirror image supporting plate are mirror images of each other; A flange is arranged on one side of the base, and a plurality of bolt holes are evenly distributed in the flange. Compared with the prior art, the auxiliary device for the electronic parking acoustic test is simplein structure, convenient to install and test and high in practicability. Internal parts are exchanged through the fixed executing mechanism, different parts are simulated to be matched, and high flexibility and reliability are achieved; And different assembly positions of the motor position can be adjusted through the bolts for simulation, and low cost and high reliability are achieved.