The present invention discloses a decorative material rolling mill having an adjustable roll gap, which includes: a left frame and a right frame connected to each other; and an upper roll and a lower roll, two ends thereof being axially disposed on the left frame and the right frame; and a driving mechanism for driving the upper roll and the lower roll to rotate; and further includes: a rolling gap adjustment mechanism for driving the upper roll or the lower roll to move vertically along the left frame and the right frame, thereby adjusting a rolling gap between the upper roll and the lower roll according to the thickness of a shearing die. The present invention uses a rolling gap adjustment mechanism to adjust a rolling gap between an upper roll and a lower roll, thereby accommodating thickness differences among die sheets, upper rolling plates, and lower rolling plates from different manufacturers. Various rolling gap adjustment mechanisms disclosed by the present invention are simple in structure and convenient to use.