The invention discloses a core inserting device for an alcohol wiping pad machine. The device comprises a bracket, a driving motor arranged on the bracket, a cam mounted on an output shaft of the driving motor, a guide rail vertically arranged on the bracket and positioned below the driving motor, and a core inserting plate slidingly arranged on the guider rail and driven by the cam to perform vertical reciprocating slide along the guide rail, wherein the upper end of the core inserting plate is connected with the cam through a connecting rod. The device uses the driving motor for driving the core inserting plate to perform a vertical reciprocating motion through the cam, and can control the stroke of vertical motion of the core inserting plate, so that the high-speed operation of whole equipment can be satisfied, the operation speed is increased from traditional about 260 pads per minute to about 370 pads per minute, the production efficiency is greatly improved, and the folding precision is also improved.