The automatic side seal shrink wrapping machine is a medium-speed full-automatic sealing and cutting packaging machine designed for bulk film wrapping production in the cosmetics industry. The whole machine is equipped with a PLC program system, adopts photoelectric sensors for automatic product detection, automatically adjusts the feeding length according to the product length, and automatically performs film sleeving, sealing, cutting and shrinking on products. The detection switch controls the motor to automatically wind up the waste film, thus realizing the feature of unmanned automatic film wrapping. This machine has high working efficiency, with a speed of 3-35 pieces per minute for products of different sizes.