The invention discloses a crushing and ore washing device. The device comprises a machine body and a groove; the machine body comprises a crushing bin and a stirring bin; a crusher is mounted in the crushing bin; the crusher comprises a crushing roller; crushing teeth are uniformly mounted around the crushing roller; an inclined baffle plate is mounted below the crusher; a stirrer is mounted below the inclined baffle plate; the stirrer comprises a stirring roller; stirring blades are uniformly mounted around the stirring roller; a sewer is mounted in the groove; a filter screen is mounted above the sewer; a cleaning tank is mounted below the groove; a cleaning nozzle is mounted in the cleaning box; a pipe is mounted below the cleaning tank; a waste water treatment box is mounted below the pipe; and a discharge port is formed in the right side of the cleaning tank. In the crushing and ore washing device, a base and rollers are mounted below the machine body for conveniently moving the machine body; and the base is provided with an extension rod and a handle to achieve the moving operation of workers.