Brittleness tester

The invention discloses a brittleness tester. The brittleness tester comprises a shell with a built-in rotating device, cylinders driven by the rotating device are arranged in the left side and the right side of the shell respectively, each cylinder is provided with an open outer side surface, arc-shaped spacers are fixedly arranged in the inner side surfaces of the cylinders respectively, and each arc-shaped spacer extends from the circle center to the inner circumferential wall of the corresponding cylinder, and is provided with installation holes aligned with one another in the extending direction. The brittleness tester further comprises a baffle, a connecting part connected with the installation holes in a matched mode is arranged at the bottom of the baffle, the baffle is detachablyconnected to the inwards-concave arc-shaped surface of the arc-shaped spacers, and the width of the baffle is not lower than that of the arc-shaped spacers. Compared with the prior art, a user can change the falling height an