The invention relates to a junior high school teaching dustless chalk producing and preparing system. The junior high school teaching dustless chalk producing and preparing system comprises a base. The left side of the upper portion of the base is fixedly connected with a first bearing column, and the middle position of the right side of the first bearing column is fixedly connected with a first bearing plate. The right side of the upper portion of the first bearing plate is fixedly connected with a second bearing column. A stirring cavity is formed in the middle positions of the first bearingcolumn and the second bearing column. A left feeding pipe and a right feeding pipe are connected to the left side and the right side of the upper portion of the stirring cavity correspondingly. The lower portion of the stirring cavity is connected with a discharging pipe, and the lower portion of the discharging pipe is connected with a forming cavity. A servo motor is arranged at the upper portion of the left side of the first bearing column, the right side of the servo motor is connected with a servo motor shaft, and a spiral blade is arranged on the side face of the servo motor shaft. Thedevice can effectively conduct mixing for junior high school teaching dustless chalk, better extrusion can be conducted on mixed materials, and accordingly manufacturing of the junior high school teaching dustless chalk is finished.