Quartz sand crushing device

The utility model relates to the technical field of quartz sand production, in particular to a quartz sand crushing device. A crushing cavity, a partition cavity and a dust removal cavity are formed in a crushing box of the device, and the partition cavity is located between the crushing cavity and the dust removal cavity; a feeding cover is arranged at the top of the crushing box, a discharging opening is formed in the bottom of the crushing box, a crushing mechanism is arranged on the upper middle portion in the crushing cavity, and a guide hopper is arranged at the bottom of the crushing cavity. An exhaust fan is arranged in the partition cavity, the air inlet end and the air outlet end of the exhaust fan communicate with an air inlet pipe and an air outlet pipe correspondingly, the air inlet pipe is connected with a dust collection assembly, one end of the air outlet pipe communicates with the dust removal cavity, and a dust removal cover is arranged at the end of the air outlet pipe; a dust removal mecha