Molecular design to give rigidity to polymer back bones is an important concept to increase the thermal stability of polymers. We introduced a unique chemical structure, polyrotaxane, to give structural rigidity to polymer back bones using a necklace-like structure and cinnamic acid as a photo-reactive monomer to prepare a new polyamide. By utilizing this unique concept, we designed aliphatic-aromatic polyamides containing the rotaxane structure composed of 4,4’-diacetoamido-α-truxillic acid, poly (ethylene glycol) bisamine (PEGBA) and methylated-α-cyclodextrin (Me-α-CD), and observed their thermo-mechanical performance and degradation behavior under UV-irradiation. The thermal degradation temperature of the polyamides was enhanced by inclusion complex formation with Me-α-CD, and the polyamide polyrotaxane was degraded by UV-irradiation via the photocleavage of the cyclobutane ring in 4,4’-diacetoamido-α-truxillic acid.