This utility patent is a single-handed vertical solid material grinder. It includes a shell, a handle set with a motion handle and a mounted handle, and a grinding set. The grinding set has a sector unit that is a sector cylinder with parallel teeth and a grinding unit with fixed teeth. The mounted handle is placed inside the shell. Between the motion handle and the shell is an elastic repositioning unit. There is a driving set between the motion handle and the sector unit. When using one hand to pull and then release the handle set, through the handle set inside the shell and the grinding set of sector unit and grinding unit, the motion handle will drive the sector unit move back and forth around the spinning axis, thus pushing the parallel teeth on the sector surface to smash back and forth through the fixed teeth on the grinding unit's surface. Thus the solid raw material is caught between the surfaces of the parallel teeth and the fixed teeth and is grinded down. So by using one hand to operate the handle set the user can continuously grind the material particles. It can reduce a lot of effort. And by setting a collection box on the outlet of the shell, the grinded particles can be collected without wasted.