Cementitious　capillary　crystalline　waterproofing　coating　was　developed,　whose　doping　quantity　of　active　substances　was　primarily　determined　by　using　orthogonal　tests,　the　doping　quantity　of　the　active　substances　and　the　cement-sand　ratio　were　optimized,　and　the　formulation　of　the　waterproofing　coating　was:　50.45%　of　silicate　cement,　40%　of　quartz　sand,　2.4%　of　assistants　and　7.15%　of　active　chemical　substances.　Test　results　showed　that　all　the　properties　of　the　developed　waterproofing　coating　conform　to　standard　requirements,　the　bonding　strength　of　wet　substrate　reached　1.8　MPa,　and　28d　seepage　resistance　reached　1.3　MPa.