The utility model discloses a device for controlling side wall D post side cut volume belongs to car component assembly and makes the field, including handle, L template, bottom plate, locating pin, bolt and packing ring, wherein, handle and L template fixed connection, bottom plate and locating pin fixed connection, the L template includes the peaceful face of profile, the bottom plate is parallel with dull and stereotyped face, fixes the bottom plate on the dull and stereotyped face of L template through the bolt, and the bottom plate is adjustable with the distance of profile. The locatinghole that inserts the locating pin side wall internal plate advances line location, profile control side wall D post side cut volume. One set the utility model discloses the device can be used for thecontrol of multiple motorcycle type and wrong limit to rectify. This device simple structure, the commonality is strong, and the cost is lower, and correction effect is good, can solve the wrong limit problem of side wall D post in the production well, effectively improves the welding quality of production efficiency and work piece.