PMMA has many applications in different medical, electronics, optics and industrial fields. PEG has been used in various biological and industrial applications. Nanometal nitride like Si3N4 NPs has good physical and chemical properties to use in many applications. Hence, the nanostructures of Si3N4 NPs doped PMMA/PEG blend can be considered as promising materials in different applications. This work comprised a recent review on PMMA and PEG nanocomposites NPs. The previous studies showed that the PMMA and PEG nanocomposites have numerous applications in optical, optoelectronics, biomedical, electronics fields.