The invention provides a small corrosion case copper-clad plate supporting device which is composed of a copper-clad plate depth adjusting screw 1 (1), a copper-clad plate depth adjusting screw 2 (2), a copper-clad plate depth adjusting screw 3 (3), a copper-clad plate depth adjusting screw 4 (4), a copper-clad plate fixing inserting slot 1 (5), a copper-clad plate fixing inserting slot 2 (6), a copper-clad plate movable inserting slot (7), a movable inserting slot plate sliding column 1 (8), a movable inserting slot plate sliding column 2 (9), a movable inserting slot plate sliding column 3 (10), a movable inserting slot plate sliding column 4 (11), an inserting slot column 1 (12), an inserting slot column 2 (13), an inserting slot column 3 (14) and an inserting slot column 4 (15). According to the device, extraction and friction between copper-clad plates can be prevented so that the quality of the corrected printed circuit boards can be greatly enhanced, the distance between the copper-clad plates is small and thus the number of the corrected printed circuit boards each time is high.