Adopting a novel technology for plasticizing powder extrusion molding (PEM), some types of novel binder for PEM of tungsten heavy alloy has been developed, and the compatibility, extruding and debinding characteristics of the binders have been studied. The thermodynamic calculation and thermal analysis, and the observation of SEM and polarization microscope were used to certify binder ingredient compatibility. The large aspect ratio tungsten alloy bars with diameters up to 24 mm have used manufactured at 60 ℃ and 75 ℃ respectively by optimizing the preparation technology of feedstock and extrusion process. By adopting the solvent-thermal debinding method the fast extruded bars with 24 mm in diameter and without defect debinding have been obtained