Raw material crushing and grading device

The utility model provides a raw material crushing and grading device. The raw material crushing and grading device comprises a base; the shell body is fixedly arranged on the base; the discharging hopper is fixedly mounted in the shell, and the interior of the shell is divided into a coarse crushing cavity and a fine crushing cavity by the discharging hopper; the graded crushing mechanism comprises a flow dividing pipe, a group of coarse crushing rollers, a group of fine crushing rollers, two groups of gears, two motors and a group of flow dividing mechanisms, the flow dividing pipe is arranged in the fine crushing cavity, the group of coarse crushing rollers are rotatably mounted in the coarse crushing cavity, the group of coarse crushing rollers are meshed with each other, and the group of fine crushing rollers are meshed with each other. And the group of fine crushing rollers are rotationally mounted in the fine crushing cavity, and the group of fine crushing rollers are engaged with each other. The raw m