Fiber　fabrics,　especially　those　with　multi-functions,　play　an　important　role　in　the　realm　of　construction　industry,　ecology,　aerospace,　etc.　In　this　work,　a　novel　one-step　foam-coating　method　was　proposed　for　multifunctionalization　of　fabric,　co-instilling　outstanding　superhydrophobicity　and　flame　retardation　for　better　practicality.　Furthermore,　our　proposed　coating　formulation　is　green　with　fluorine-　and　halogen-free　attribute,　with　only　ammonium　polyphosphate　(APP),　Polydimethylsiloxane　(PDMS)　and　phytic　acid-dissolved　Cu　(PA-Cu)　co-incorporated　in　the　system.　The　finished　fabric　is　light　and　highly　breathable,　ascribed　to　its　extremely　thin　coating　layer.　Also,　our　proposed　method　permits　material　coating　with　low　liquid　content,　thereby　enabling　water　saving　up　to　60%.　Upon　evaluating,　fabric,　upon　treated　with　our　proposed　method,　promises　superhydrophobicity　with　an　high　contact　angle　of　154.8　&　PLUSMN;　1.9　degrees.　This　is　endowed　by　the　microstructure　and　roughened　surface　of　fabric　that　repels　water　like　lotus　leaf.　Consequently,　an　astonishing　self-cleaning　capability　was　also　realized,　allowing　facile　＇picking　up＇　of　surface　dirt　as　water　rinses　over　the　fabric.　As　for　flame　retardation,　the　treated　fabric　recorded　a　high　limiting　oxygen　index　(LOI)　of　37.5%,　comparing　to　17.5%　of　its　pristine　counterpart.　This　can　be　related　to　the　collective　functions　enabled　by　the　components　(APP,　PDMS　and　PA-Cu)　in　our　foam　formulation.　Principally,　our　reported　effective　and　low-consumption　foam-coating　strategy　enriches　the　splendid　properties　of　novel　on-demand　fabrics　for　broad　applications,　concurrently　opening　up　an　insightful　horizon　for　other　artificial　material　design　as　well.