This machine is to smash 50?50 mm rubber processed by tire crusher into mm rubber grain in ambient temperature. Its composed of main axis, movable sword-plate, movable 6 - 12 sword, running wheel, stable sword-seat, stable sword, filter, in-filler and in-out circular water cannula, etc. Its main feature lies in that materials directly enters from the in-filler into smashing room, pass on transfer, parts drive principal axis to revolve at high speed, make movable sword and stable sword cut materials into grains at a high speed, volume of materials can be controlled by adjusting the interval between swords to let grains fitting to filter output from outlets. The smashing room is cooled down by circular water all the way during the whole smashing process.