Zinc layer surface passivating treatment liquid

The invention discloses zinc layer surface passivating treatment liquid. The zinc layer surface passivating treatment liquid consists of the following components by weight percent: a) 6.0 to 10.0 percent of inorganic salt corrosion inhibitor, b) 1.0 to 8.0 percent of organic acid metal activating agent, c) 6.0 to 10.0 percent of pH value regulating agent, d) 8.0 to 30.0 percent of alcohol cosolvent, e) 10.0 to 30.0 percent of silicon containing sealant, f) 30.0 to 50.0 percent of cationic or non-ionic waterborne polyurethane emulsion, and g) 0.5 to 2.0 percent of dispersing agent, defoaming agent, thickening agent and wetting agent. The film obtained by the treatment liquid has binding force with a galvanizing layer, is compact, colorless and transparent, and has high white rust resistance.