Abstract: This invention relates to a micro-curvature adjustable device for curve screen printing presses and ironing presses and in particular to one including an upper cover provided with a tool post in a front side and an adjusting mechanism on an upper surface, an oscillating plate mounted below the upper cover and having a front seat, a horizontal sliding block for passage of a shaft, and a pair of clamping arms in the front side, an oscillating arm arranged on the upper cover and connected with a front linking block, a downward oscillating block and a rear linking block, a rear connecting arm mounted under the upper cover and having a rear horizontal groove and a plurality of rear vertical sliding blocks in an inner side, an axle seat arranged between the front connecting plate and the rear connecting plate and having a pivoted gear engaged with a front toothed rack and a rear toothed rack, a front connecting plate provided with a front horizontal groove and a plurality of vertical sliding blocks at an inner side