The invention discloses a pulverizing and mixing machine which comprises a control box and a stirring barrel, wherein the middle part of the stirring barrel is provided with a stirring shaft; the outer side of the stirring barrel is articulated with a sealing cover through a hinge plate; the outer side of the sealing cover is provided with an induction sheet; the outer side of the control box is respectively provided with a start switch and a shutdown switch; and the front surface of the control box is provided with a sensor which is matched with the induction sheet. The upper part of the sealing cover is provided with the induction sheet, and the outer side of the control box is provided with the sensor; when the stirring barrel operates normally, the induction sheet and sensor are arranged in opposite; when charging or discharging is required in the middle, the stirring barrel is rotated by a handgrip, thereby driving the induction sheet to rotate and depart from the sensor; the sensor transmits a signal to the control box, and the inside controller shuts down the power unit, so that the user does not need to manually switch on or off, thereby omitting the unnecessary time; and the pulverizing and mixing machine is simple to operate, and safe and convenient to use.