The invention relates to the technical field of accessory devices for module production, and particularly relates to a preservative preparation device for module production, wherein the interior of apreparation cylinder is easy to clean, the working efficiency is improved at the same time, and the material waste is reduced while the cleaning burden on the workers is relieved. The preservative preparation device comprises a transverse bracket, a support frame, a base, a preparation cylinder, a rotary motor, an air cylinder and a stirring shaft, wherein the rotary motor is arranged in the lefthalf area at the bottom end of the transverse bracket; a rotation shaft is arranged on a bottom output end of the rotary motor; a stirring blade is arranged at the lower end of the outer side wall ofthe rotation shaft; the preservative preparation device also comprises four groups of telescopic motors, a connecting plate and an annular baffle, wherein the four groups of telescopic motors are arranged on the left front side, the left rear side, the right front side and the right rear side of the top end of the connecting plate respectively; a movable rod is arranged at the bottom output ends of the four groups of telescopic motors respectively; a sponge layer sleeves the outer side wall of the annular baffle, and bristles are arranged on the sponge layer; the preservative preparation device further comprises a vibrating table and a reinforcing member; the preparation cylinder is arranged at the top end of the vibrating table.