The present invention provides a thermoresponsive copolymer having a structure as shown in formula (III). The present invention also provides a thermoresponsive copolymer consisting of monomer as shown in formula (IV), (V) and (VI). The present invention also provides their preparation methods and application thereof. The above formulas are as follow:本發明係提供一種熱應答型高分子聚合物,其係具有下通式(III),其中R1為甲基或甲苯-4-磺醯基;R2為甲基或氯。本發明亦提供一種熱應答型高分子聚合物,其係由通式(IV)、(V)與(VI)所示結構組成。本發明亦有關於前述熱應答型高分子聚合物之製備方法及應用。前述通式如下所示: