The invention discloses a manufacturing process for improving the content of basic lead carbonate on the surfaces of unformed plates. The process comprises the following steps: each unformed plate smear is rolled on dilute sulfuric acid through the method in which a rich solution roll is dipped with a barren solution for rolling, so that a lead sulfate layer is formed; through the method in which a rich solution roll is dipped with a barren solution for rolling, the surface of the lead sulfate layer of each unformed plate is rolled on a sodium carbonate solution or a sodium bicarbonate solution, so that a sodium carbonate layer or a sodium bicarbonate layer is formed; after take-up, the unformed plates are hung on a curing rack and spaced at certain intervals, and when the rack is full, the time during which the unformed plates stay outside is controlled; during curing humidity preservation and dehumidification processes for each unformed plate, when water exists, the sodium carbonate layer or the sodium bicarbonate layer reacts with lead oxide and lead sulfate in lead plaster to form a superficial basic lead carbonate layer, so that a meshed tribasic lead sulfate and tetrabasic lead sulfate frame is formed inside each unformed plate. The production process provided by the invention has the advantages that the content of the basic lead carbonate in the dry lead plaster of each unformed plate is improved, so that the strength of each unformed plate is enhanced, the product rejection rate is reduced, and higher product quality and lower cost are achieved.