Limestone crushing device

The utility model relates to the technical field of limestone processing, in particular to a limestone crushing device, and aims to solve the problem of low limestone crushing efficiency in the prior art, the limestone crushing device comprises a box body and a feeding port formed in the top of the box body, and a primary crushing mechanism and a deep crushing mechanism are arranged in the box body. The deep crushing mechanism is located below the primary crushing mechanism, and the primary crushing mechanism comprises two first transmission shafts arranged in the box body and two first crushing rollers connected to the exteriors of the two first transmission shafts in a sleeving mode correspondingly. And a displacement mechanism for driving the two first transmission shafts to move and a driving mechanism for driving the two first transmission shafts to rotate are arranged on the outer side of the first crushing roller. According to the limestone crushing device, large-size limestone can be crushed more effe