The two-stage cinder breaker solved the problem of wet grinding cinders which has existed for a long time. There are three characteristics as follows: First, this machine has not bi bottom screen, each kind of wet slag can be crushed, even it comes out from water, it does not exist the phenomenon of binding and clogging. Second, The two grade double grinding at the same time .the reduction ratio is big, leaves the material granularity doesn't surpass 3mm,It can satisfy the request of producing standard brick and the hollow brick. Third, the output is high, low power consumed. Each hour may crush above 20 tons, the cost of crushing each ton cinder (electrical bill, attrition, wages) not to surpass 2.5 Yuan, the two-stage grinders have the similar smashing effect to shale, gangue.