the invention discloses an environmental-protective water-based priming paint, which comprises two formulations: one is 50-60% metasilicate liquid, 20-30% metal dioxide, 15-20% emulsion and 1-10% adjuvant; the other is the other is 4440-50% zinc powder, 20-30% white compound Si-Ti rust-proofing powder, 1-5% thermal-insulating iron oxide black, 10-15% thermal-insulating iron buff and 10-15% thermal-insulating iron oxide green. The invention adopts water as solvent without polluting and VOC drainage, which can bear washing after drying for 30 min. |