Abstract: Thermoplastic starch plasticised by glycerol (GTPS) /poly(butylene-succinate) (PBS) blends were prepared using glycerol as the plasticizer. Besides, structure and performance of the blends were also characterized. Results showed that during processing the torque of GTPS/PBS blends and mechanical properties increased with the rising of PBS mass fraction and the decreasing of glycerol mass fraction. Scanning electron microscope (SEM) showed that more glycerol would improve the compatibility of the blends. Dynamic mechanical analysis (DMA) results suggested that storage modulus of blends in glassy state was higher than PBS, but conversely in rubbery state. Furthermore, the blends with higher PBS and glycerol mass fraction exhibited better thermal stability. Absorption rate decreased from more than 100% to less than 10% by adding PBS. Both starch and glycerol could improve the biodegradation rate of PBS.