The invention relates to a baking-aging resistant colored steel plate/strip and a manufacturing method thereof. The base plate of the steel plate/strip comprises the following components in percentage by weight: less than or equal to 0.003 percent of C, 0.15 to 0.25 percent of Si, 0.5 to 0.8 percent of Mn, 0.06 to 0.08 percent of P, less than or equal to 0.01 percent of S, 0.04 to 0.07 percent of Ti, 0.0004 to 0.0008 percent of B, less than or equal to 0.003 percent of N, 0.025 to 0.065 percent of Al and the balance of Fe and unavoidable impurities. The manufacturing method comprises the steps of smelting, casting, hot rolling, cold rolling, annealing, electroplating and coating an organic membrane. The annealing process is performed in a continuous annealing furnace, wherein protective gas in the annealing furnace comprises the following components: 2 to 7 percent of hydrogen and the balance of nitrogen. The electroplating process is performed in a plating bath, wherein the current intensity is 6 to 21 kiloamperes; the zinc ion concentration in plating solution is 100 to 150 g/L; and the plating solution temperature is 50 to 55 DEG C. The baking temperature of the process of coating the organic membrane is 230 to 250 DEG C. The method has the advantages of simple production process and high operability.