The utility model discloses a measuring device for measure the sufficient roller bevel edge angle of chamfer crystallizer angle and chamfer, measuring device, include: blunt angle part, blunt angle part is one irregularly fan -shaped, it is irregular fan -shaped for having lacked the fan -shaped of partly arc chord angle, blunt angle part's central angle is the obtuse angle, sharp angle part, sharp angle part is fan -shaped, sharp angle part's central angle is the acute angle, just sharp angle part's centre of a circle department with blunt angle part's centre of a circle department is connected, rotary part sets up blunt angle part and sharp angle part's centre of a circle department, through rotary part can so that sharp angle part with blunt angle part is rotatory. This measuring devicehas realized the convenient technological effect of just accurately measuring chamfer crystallizer angle and the sufficient roller bevel edge angle of chamfer.