The invention discloses a two-grade pulverizer comprising a supporting frame, a main motor fixed to the back side of the supporting frame, a first-grade pulverizing mechanism and a second-grade pulverizing mechanism, wherein the first-grade pulverizing mechanism and the second-grade pulverizing mechanism are sequentially arranged on the supporting frame from top to bottom and communicate. The mainmotor is connected with the first-grade pulverizing mechanism and the second-grade pulverizing mechanism through a gear transmission mechanism in a drive manner. By the adoption of the two-grade pulverizer, the situation that workers conduct feeding twice in the machining process is avoided, the steps from feeding to discharging are automatically completed in a one-off manner, the machining efficiency of raw materials is improved, the labor intensity of operation personnel is lowered, and the two-grade pulverizer is simple in structure, small in size, easy and convenient to operate and higherin efficiency.