Transparent toughness polyactic acid composition

The invention discloses a transparent toughness polyactic acid composition, which consists of the following components in part by weight: (A) 100 parts of polymer of which the main body is polyactic acid, (B) 1 to 30 parts of biodegradable aliphat polyester resin, and (C) 0.1 to 5 parts of reactive compatilizer, wherein the reactive compatilizer is an acrylate polymer having an epoxy reactive functional group, and the epoxy functionality is 0.1 to 1 meq/g. The composition has high impact properties, and simultaneously and obtained product has high transparency; besides, in the processing process, the reactive compatilizer is adopted to control the epoxy functionality and the addition to ensure that the problems of over-high melt viscosity and oversized processing torque in the processing process are solved, the processing difficulty is reduced, and the processing cost is reduced.