The invention discloses an antibacterial functional polymer master batch and a packaging film. The antibacterial functional polymer master batch comprises the following raw materials: low density polyethylene, a solubilizer, an antioxidant, an antibacterial agent, sodium stearate, pentaerythritol stearate and oleamide. The antibacterial functional polymer master batch and the packaging film have antibacterial and preservative functions, the storage period of a product can be effectively prolonged, the packaging film has a good barrier property on vapor and oxygen, respiration and oxydative spoilage of the product can be reduced, and the packaging film has good tension strength, is easy to pack and mold, and is safe and convenient to use.