Combined bevel surface

The utility model relates to a combined bevel surface with adjustable angle and length, which belongs to the field of physical teaching aids. The combined bevel surface is characterized in that bent plates with scales are symmetrically arranged on two sides of a slide plate and a bottom plate; one end of the bent plate is connected on the bottom plate through a pin; a cambered sliding chute arranged at the other end of the bent plate is matched with a guiding column arranged on the side surface of the slide plate; one end of the guiding column is fixed on the slide plate; and thread arranged at the other end of the guiding column is fixed in the cambered sliding chute through a nut, therefore, the combined bevel surface has the advantages of simple structure, adjustable length and angle of the bevel surface, and convenient carrying.