The utility model relates to a steel plate sticking pressurization device, which solves the problems that many procedures of a steel plate sticking reinforcement and model test are needed, materials cannot be used repeatedly, thickness of an adhesive layer cannot be effectively controlled, the uniformity of the thickness of the adhesive layer cannot be guaranteed. Two strip-shaped width adjustable pressurization plates are oppositely arranged, groove mouths are formed at the two ends of each pressurization plate; two pressurization pull rods with threads are arranged and clamped on the groove mouths on the two sides of the width adjustable pressurization plate; one width adjustable pressurization plate and the two pressurization pull rods are fixed through width adjustable screw nuts and spacing screw nuts positioned on the two surfaces of the width adjustable pressurization plate and sleeved on the pressurization pull rods; and a pressurization screw nut sleeved on the pressurization pull rod is arranged on the bottom surface of the other width adjustable pressurization plate, and a magnetic adhesive layer thickness control block is adhered onto the top surface of the other width adjustable pressurization plate. The steel plate sticking pressurization device provided by the utility model is suitable for steel plate sticking pressurization for rectangular reinforced concrete beams of different widths and heights, the pressurization device can be used repeatedly, material waste is avoided, and the cost of the model test is reduced.