Sticky food is prone to residue on the surface of the packaging material, affecting the consumer experience while not conducive to the recycling of materials. This research was aiming at preparing super-hydrophobic poly(lactic acid)(PLLA) by combination of copolylization, blending and hot pressing. PLLA-PDMS-PLLA (PLDLx) triblock copolymer was synthesized by ring-opening polymerization of lactide (LA) with hydroxy-terminated poly-dimethylsiloxane (PDMS) as initiator. The copolymer was further blended with different content of Nano hydrophobic silica (SiO2) to improve its hydrophobicity.Finally, didderent surface structures were constructed by hot pressing. The structure, composition, molecular weight, mechanical properties, gas barrier property and contact angle of the composite films were characterized. Results showed that with the the crystallinity of PLLA was reduced existence of PDMS and SiO2. However, the composite films kept better flexibility and the maximum elongation at break was increased about 10 times; the water vapor and O2 permeability decreased slightly. Moreover, the contact angle of PLDL0.5Sμ-80 blending film reached 153°, suggesting a super-hydrophobicity. The residual rate of yogurt with 300 mPa·s viscosity decreased to only 9.4%.