Objective To study the thermal, barrier and thermal shrinkage properties of PLLA films with different draw ratios. Methods PLLA thermal shrinkage films with different draw ratios and uniaxially stretched PLLA films were prepared by a twin-screw extruder. Thermal shrinkage and barrier properties of the PLLA films with different draw ratios were measured by an DSC, a water vapor permeability tester and an oxygen permeability tester. Results The crystallinity of PLLA increased from 0. 2% at ratio = 1 to 41. 8% at ratio = 6. 5, and the crystallization rate and crystallinity increased significantly. The barrier properties of PLLA were improved by the orientation and crystallization. The shrinkage films showed an excellent thermal shrinkage behavior, while the stretched films losted their thermal shrinkage. Conclusion Uniaxial stretching could effectively improve the crystallization rate and crystallinity of PLLA films. The moisture and oxygen barrier properties of the PLLA films are relatively good after medium stretching.