The invention discloses a galvanized plate integrated dividing joint. A plurality of straight dividing joints and a plurality of cross-shaped dividing joints are adopted to be assembled into an onsiteassembled dividing joint, independent dividing joints adopted in the straight dividing joints and the cross-shaped dividing joints are galvanized plate dividing joints, and the two sides of the straight dividing joints are provided with force transmission steel plates. The galvanized plate integrated dividing joint is reasonable in structural design and good in using effect, and the problems thatin the prior art, during existing large-area concrete terrace dividing joint construction, the construction period is long, the using effect is poor, the frost heaving resistance is low, and the construction quality is unlikely to be ensured can be effectively solved. Meanwhile, the invention further discloses a method for constructing the concrete terrace through the galvanized plate integrateddividing joint. The method comprises the steps of 1, dividing joint machining, 2, surveying and setting out, 3, dividing joint onsite assembling, 4, reinforcement cage binding, and 5, concrete overallpouring. The method is simple, design is reasonable, the construction efficiency is high, the construction period is short, and the construction quality can be effectively ensured.