Broken system of soil piece, including the mount, be equipped with the hopper in the mount, the hopper upper end is the feed inlet, the hopper lower part is equipped with dials the material device, the hopper below is equipped with the support frame, be equipped with on the support frame and be located the breaker of dialling material device rear, the breaker lower part is equipped with the discharge gate, the breaker includes the casing, be equipped with broken main shaft in the casing, be equipped with crushing drum on the broken main shaft, be equipped with first broken group and the broken group of second on the crushing drum outer wall, it includes carousel and worm gear reducer to dial the material device, be equipped with group material piece that is the tetrahedron structure on the carousel, hopper lower part cover is equipped with the rubber circle, the back lateral part correspondence of rubber circle and hopper is offered jaggedly, be connected through the stock guide between the import of breach and breaker. The utility model discloses job stabilization, crushing effect is good, crushing efficiency is high, the maintenance is convenient, be convenient for change damageable parts.