Coal crushing device

The invention discloses a coal crushing device, and belongs to the field of coal crushing equipment. The coal crushing device comprises a primary crushing device, a secondary crushing device, a partition plate, a discharging box, supporting legs and a storage box; the primary crushing device is located at the uppermost end and supported by the supporting legs; the secondary crushing device is located below the primary crushing device and arranged on the partition plate; the partition plate is arranged on the four supporting legs; the discharging box is arranged under the partition plate; and the storage box is arranged under the discharging box. According to the coal crushing device, grading crushing is conducted by adopting the primary crushing device and the secondary crushing device, fixing push heads which are symmetrically distributed in a crossed mode are arranged in the primary crushing device so that large-size coal can be fixed, primary crushing is conducted on the large-sizecoal through hydraulic cr