This paper studied the influence of drying process on the moisture content,thermal properties,intrinsic viscosity and crystallinity of recycled polyester(PET)bottle flakes,followed by the test of rheological properties.The experimental results show that the moisture content reduced with the increase of the drying temperature and time,and that the moisture content could be controlled within 0.08% at 160℃ for 6 h.The higher drying process brings the improvement of glass transition temperature,crystallization ...