Most of NMR methods have been used for pure compounds and require sample purification prior to data collection. LC-NMR and DOSY experiments can be alternative approach for the analysis of mixtures in solution. Here, we present an efficient solid mixture analysis method on the solid-state NMR spectroscopy. In this ROSY(Relaxation Ordered SpectroscopY) experiments, the 1H longitudinal (T1) relaxation time is used to separate the overlapping 13C chemical shift spectra of solid mixtures via an inverse Laplace transform(ILT) of the relaxation dimension. The principle is that rapid intra domain spin diffusion caused by strong 1H-1H dipolar coupling in solid samples equalizes the 1H T1 relaxation in a domain. Through this technique, a solid mixture of synthetic polymers can be separated on a solid NMR spectrum.