The invention discloses a preservative film packaging machine. An existing semi-automatic preservative film packaging machine easily infects bacteria during packaging, and a fully-automatic preservative film packaging machine is not suitable for being used in a supermarket or by individual household. A controller of the preservative film packaging machine controls a preservative film circulating pulling device, a preservative film cut-off device, a preservative film clamping device and a tray lifting device to act; a preservative film is arranged on a preservative film optical axis in a sleeving mode, and one end of the preservative film is continuously pulled out by the preservative film circulating pulling device; the pulled-out preservative film is cut off by the preservative film cut-off device after being clamped by the preservative film clamping device; when a tray conveyed by the tray lifting device lifts, the preservative film clamping device enables two sides of the cut-off preservative film to package the tray; and when the tray is manually taken out, the other two sides of the preservative film package the tray. According the preservative film packaging machine disclosed by the invention, sanitation hidden danger is solved, a preservative film utilization rate is increased, and production efficiency is improved.