Convenient drawing device for mathematics teaching

The convenient drawing device for mathematics teaching comprises compasses and a drawing rod, a feeding cavity is formed in the middle of the drawing rod, a push plate is slidably connected to the inner wall of the top end of the feeding cavity through a compression spring, and a plurality of pieces of chalk are vertically arranged on the inner side of the feeding cavity; two first pushing rollers are arranged on the inner side of the bottom end of the drawing rod through an extending mechanism, the extending mechanism is used for controlling the downward movement amount of chalks in the feeding cavity according to the consumption amount of the chalks, a replacing mechanism is arranged on the left side of the bottom end of the drawing rod, and the replacing mechanism is used for replacing the chalk when one piece of chalk located at the bottom end falls off from the position between the two first pushing rollers. The convenient drawing device for mathematics teaching solves the problems that an existing conve