Polyester composition and polyester sheet

The invention discloses a polyester composition and a polyester sheet. The polyester sheet includes at least one modified layer made from a polyester composition including a polyester, a polyester-polyether copolymer, a slip agent which has a solubility parameter ranging from 17 MPa1/2 to 22 MPa1/2, and an anti-blocking agent. Based on 100 parts by weight of the polyester, the polyester-polyether copolymer is present in an amount ranging from 0.5 part by weight to 5 parts by weight, the slip agent is present in an amount ranging from 0.02 part by weight to 0.5 part by weight, and the anti-blocking agent is present in an amount ranging from 0.05 part by weight to 0.6 part by weight. The polyester sheet comprises at least one modified layer, and the at least one modified layer is prepared from the polyester composition. According to the polyester composition, the polyester sheet has good stacking cutting performance in a normal-temperature environment and a low-temperature environment, and the polyester sheet h