The utility model discloses an automatic change pulverizer, it relates to automation equipment technical field, smash the bottom in storehouse and install down the feed bin, weighing sensor installs at the both ends of smashing the storehouse bottom, feed hopper installs at the upper right end of smashing the storehouse, feed hopper's lower extreme is provided with the picture peg, picture peg and the actuating shaft connection who drives the regulator, crushing motor is installed at the middle part of smashing the storehouse, the welding has the main shaft in the pivot of crushing motor, install the several on the main shaft and smash the leaf, the bottom in crushing storehouse is installed and is slipped through the net, the unloading funnel is installed under inside the feed bin, the lower extreme of unloading funnel is provided with unloading conveying mechanism, the electric box is installed at the upper left end of smashing the storehouse, weighing sensor, operating device all are connected with the input of treater, the output of treater respectively with the drive regulator, smash the motor, unloading conveying mechanism connects, the utility model discloses be convenient for realize automated control, easy and simple to handle, convenient to use has improved work efficiency, saves time