The invention discloses a scale type distortion coefficient measuring instrument for an automobile topography measurement system and aims to solve the problem that a camera lens distortion coefficient of an automobile topography visual detection system cannot be simply and conveniently measured. The scale type distortion coefficient measuring instrument for the automobile topography measurement system mainly comprises sleeves (1), scale rulers (2), steel wires (3), a square steel frame (4) and adjusting bolts (6); the steel wires in a distortion image are changed to be original straight lines by controlling stretching of the steel wires through the adjusting bolts (6), and the distortion coefficient is acquired according to displacement of the adjusting bolts (6). The scale type distortion coefficient measuring instrument for the automobile topography measurement system is simple in structure, high in detection accuracy, simple and convenient to operate, easy to mount, lower in cost and reliable in performance.