Noil discarded fibers from fiber production for textile industry have short length and are always considered less valuable.Here,noil ramie fibers/HDPE composite is prepared using twin-screw extruder and the dynamic mechanical and thermal properties are studied.The influence of ramie fiber and maleic anhydride-grafted polyolefin(MA-g-PO)on mechanical,dynamic mechanical and thermal properties is investigated.It is observed that the tensile,flexural and impact properties of the composites treated with MA-g-PO are all improved in comparison to the untreated composites.Dynamic mechanical properties of the composite with MA-g-PO show an increase in the storage modulus with a higherαrelaxation peak,together with the micromorphology analysis,indicating an improved interfacial bonding between fiber and matrix by the MA-g-PO addition.Furthermore,the change in TGA thermograms of composite caused by MA-g-PO exhibits that the addition of MA-g-PO is also helpful to increase the thermal stability of noil ramie fiber/HDPE composites. Noil discarded fibers from fiber production for textile industry have short length and are always considered less valuable. Here, noil ramie fibers / HDPE composite is prepared using twin-screw extruder and the dynamic mechanical and thermal properties are studied. Influence of ramie fiber and maleic anhydride-grafted polyolefin (MA-g-PO) on mechanical, dynamic mechanical and thermal properties is investigated. It is observed that the tensile, flexural and impact properties of the composites treated with MA-g-PO are all improved in comparison to the untreated composites. Dynamic mechanical properties of the composite with MA-g-PO show an increase in the storage modulus with a higher alpha relaxation peak, together with the micromorphology analysis, indicating an improved interfacial bonding between fiber and matrix by the MA-g-PO addition.Furthermore, the change in TGA thermograms of composite caused by MA-g-PO exhibits that the addition of MA-g-PO is also helpful to increase the thermal stability of noil ramie fiber / HDPE composites.