 This study investigates the properties of mold ramifibers reinforced with polylactic acid, PLA, biocomposites, specifically analyzing interfacial adhesion, wetability, and thermal properties before and after diammonium phosphate, DAP, treatment on the surface of ramifibers. The results show that DAP treatment significantly improved wetting behavior, decreased degradation temperature, and was consistent with changes in peak transmission spectrum observed by Fourier Transform Infrared Spectroscopy, FDIR.