In present work has been investigated the in fluence of electrothermopolarization on the strength and photoluminescent properties nanocompositions on the basis of cadmium sulphide and polypropylene, which treated by elecrtical discharge in air quality. Has been shown that after electrothermopolarization amplitude of maximum increases at length of the waves λ=534 nm, λ=627 nm and λ=809 nm for nanocomposition PP CdS. Electrothermopolarization changes phase interactions, in nanoparticles CdS are actuated additional luminescent centres, as a result amplitude of photoluminescence grows. Has been established that discharge treatment of polymeric powder, electrotermopolarization and other technological factors change supramolecular structure of the polymer, interphase interaction between components of the compositions and thickness interphase layer.