The utility model relates to a powerful disintegrator which belongs to the improvement of material processing disintegrating machinery. The powerful disintegrator is characterized in that an integral type rotary drum is formed by the combination of the rotary drum core and the hammer head of the existing disintegrator of the same type in a casting way, the connection between a top cover and a machine housing and between a side cover and a machine seat is all concave convex type labyrinth seal structure, the connection between the machine housing and the machine seat is groove pad strip seal structure, and the place between the connection port of the top cover and the connection port of a top tooth plate is stagger type seal structure. The utility model has the advantages of strong cutting capability, high durability, good tightness and small land occupation area and is suitable for the industries of pharmaceutical, chemical, plastic, food, feedstuff, etc.