The invention discloses a color coating chromium-free pretreatment solution for a galvanized plate, and belongs to the technical field of chromium-free passivation of galvanized plates. The color coating chromium-free pretreatment solution comprises the following components in percentage by mass: 8 to 20 percent of organic silane, 1.2 to 4 percent of inorganic salt, 1 to 2 percent of oxidant, 0.12 to 0.24 percent of complexing agent and the balance of deionized water serving as a solvent. The pH value of the chromium-free pretreatment solution is 3 to 4, and is regulated through inorganic acid. The chromium-free pretreatment solution can form a three-dimensional netlike compact organic silane blocking layer based on a formed inorganic metal compound precipitation membrane; and meanwhile, because the organic silane is added, the bonding force of a passivation film and a galvanized layer can be increased, the corrosion resistance, washing resistance and abrasion resistance of the passivation layer can be improved, and the requirement of a color coating process can be fully met. The pretreatment solution can be prepared by using the conventional passivation equipment and processes, does not contain chromium, and is environmentally-friendly passivation solution.