The work aims to analyze the effect of aluminized polylactic acid (PLA) film and kraft paper composite on the properties of kraft paper composites, study the effect of the paper composite packaging on the preservation of Chinese herbal medicine mint, and discuss its application potential in the field of packaging and preservation of agricultural products. The barrier properties and mechanical properties of kraft paper were enhanced by the composite of PLA aluminized film and kraft paper, and the disadvantages of simple kraft paper were made up. The mechanical properties and barrier properties of kraft paper matrix composites with PLA aluminized films were significantly improved. The application of the composite packaging to mint showed that the composite had good barrier properties and anti-mold properties, and met the requirements of environmental protection. PLA aluminized film/kraft paper composite packaging can effectively reduce the weight loss rate of mint, maintain its color and freshness, and extend the freshness period. The results of sensory evaluation show that the kraft paper based composite packaging material has better performance in maintaining the color, integrity and brittleness of mint.