A kind of binder technology for extrusion molding of hardmetal powder has been developed. By optimizing the binder formulation design and its fabrication method and technical conditions, the novel binders, with excellent properties and uniform distribution, were manufactured. The thermal debinding processes and its mechanism of binder and feedstock have been studied. It is found that the thermal debinding can be divided into two stages, egthe low temperature stage and the high temperature stage. And their thermal debinding mechanism is the mechanism of thermal diffusion, but the thermal debinding activation energies are different in the two stages. The results show that adding of other components acted as a catalyzeing in either binder or feedstock, and can decrease effectively the activation energy of thermal debinding processes.