The invention provides a brake, discloses a raw material storing and conveying device for an injection molding machine, and relates to the field of raw material storing and conveying. The raw materialstoring and conveying device comprises a raw material storing box, a discharging opening is formed in the lower end of the right side of the raw material storing box, a conveying pipe is connected tothe right end of the discharging opening, the other end of the conveying pipe is connected with a sucking device, an infrared ray signal lamp is installed above the inner wall of the discharging opening, a signal receiving plate matched with the infrared ray signal lamp is arranged below the inner wall of the discharging opening, a rotating base is arranged on the inner wall of the right side ofthe raw material storing box, rotating rods are arranged on the rotating base and comprise a first rotating rod and a second rotating rod, and protruding conic particles are installed on the side wallof the first rotating rod. According to the raw material storing and conveying device, the infrared ray signal lamp is matched with the signal receiving plate to automatically control rotation of therotating rods, the problem about blockage of the discharging opening is solved, up and down movement of a bearing plate can accurately reflect whether the raw material storing box needs to be supplemented for raw materials or not, and the overall device effectively improves the production efficiency and is high in practicability.