The invention discloses a polymer system in controllable association strength. The polymer system comprises a subject cyclodextrin polymer and an object surfactant; the subject cyclodextrin polymer is selected from linear cyclodextrin polymer and modified Nano-SiO2 star-shaped macromolecule cyclodextrin polymer; the object surfactant is selected from adamantine-sodium octadecyl sulfate, adamantine-lauryl sodium sulfate, adamantine-cetyl sodium sulfate, benzyl-sodium octadecyl sulfate, benzyl-lauryl sodium sulfate and benzyl-cetyl sodium sulfate. In an application, the cyclodextrin polymer is prepared into an aqueous solution in the concentration of 0.1-0.5g/ml and then is mixed with the surfactant, the cyclodextrin advantage is utilized to wrap adamantine or benzene ring while the alkyl hydrophobic chain is exposed on the exterior of the cyclodextrin hydrophobic chamber, so that the polymer system in controllable association strength can be realized, the system viscosity is changed and the purpose of dynamically regulating the system viscosity can be achieved.