Recently, polylactic acid (PLA) has gained attention owing to its advantages, such as sustainability, eco-friendliness, and biocompatibility. However, PLA has not been widely utilized because of its low mechanical properties, especially tearing strength. In this study, halloysite nanotube (HNT) added PLA composite film was prepared through meltblending to improve the tearing strength. The tensile strength of the PLA/HNT composite films was enhanced by the filler effect, homogeneous dispersion, and good compatibility of the HNTs. Moreover, the tearing strength of the PLA composite film significantly increased from 3.8 to 5.8 N/mm when the HNT was added at 1 wt%.