Crushing device and ash treatment system

The utility model relates to the technical field of ash treatment, in particular to a crushing device and an ash treatment system, which comprise a shell unit, a crushing unit arranged in the upper shell unit, and a mounting unit arranged on the outer side of the upper shell unit, the crushing unit comprises a driving assembly, an adjusting assembly arranged below the driving assembly and a crushing assembly arranged below the adjusting assembly; the driving assembly comprises a main driving piece, a displacement driving piece arranged at one end of the main driving piece, a rotation driving piece arranged on the outer side of the main driving piece and a movable connector piece arranged at one end of the rotation driving piece. The ash crushing device has the beneficial effects that ash is stirred while being crushed through the adjusting assembly and the crushing assembly, so that the ash can be fully crushed; the size of the crushed ash is controlled by arranging a sieve plate, so that the ash reaches the