Thermogravimetric analysis was used to characterize the modification effect of silicane coupling agent on nano-silica. It showed that the optimized dosage of silicane coupling agent for chemical-bonded coating was 5 phr. The modified nano-silica was introduced into poly （butylene succinate） （PBS） and the crystallization kinetics of the system was studied using differential scanning calorimeter and polarizing optical microscope. It showed that the surface modified nano- silica had a heterogeneous nucleation effect and led to an increase in crystallization rate and a decrease in crystallinity. However, the crystallization temperature raised only 4℃ even at high nano-silica content of 10 %. With the increase of silica content, the tensile strength and elongation at break firstly increased and then declined, nevertheless the change of tensile strength was moderate. When the content of modified nano-silica was 1.5%, the elongation at break reached 10. 79 %, which contrasted to 7. 53 %of neat PBS.%采用热重分析法研究了硅烷偶联剂用量对纳米二氧化硅（SiO2）的表面改性效果；通过差示扫描量热（DSC）、热台偏光显微镜（POM）及力学性能等测试手段研究了改性纳米SiO2对聚丁二酸丁二醇酯（PBS）结晶性能和力学性能的影响。结果表明，在偶联剂用量为5份、渗透剂用量为2份的条件下，纳米SiO2的表面改性效果最好。纳米SiO2有异相成核作用，可以使PBS的结晶速率增大，相对结晶度降低，但对结晶温度的影响不大，仅在高填充量时（10％）有4℃的增幅。随着纳米SiO2含量的增加，PBS的拉伸强度和断裂伸长率先升高后
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