Forward　osmosis　(FO)　proves　advantageous　in　various　water　treatment.　However,　its　potential　application　largely　relies　on　the　availability　of　suitable　draw　solutes.　Here　we　report　a　series　of　multi-charged　betaine　metallic　complexes　for　the　removal　of　Cu2+,　Zn2+　and　Ni2+　ions　from　electroplating　wastewater　through　FO.　All　betaine　metallic　complexes　surpass　the　currently　reported　synthetic　draw　solutes　and　conventional　NaCl,　NH4HCO3　by　increasing　water　fluxes　up　to　350%　along　with　insignificant　solute　losses.　Meanwhile,　the　betaine　metallic　complexes　can　generate　a　water　permeation　rate　at　least　300%　higher　than　most　commonly　used　NaCl　draw　solute　in　treating　electroplating　wastewater　containing　Cu2+,　Zn2+　and　Ni2+　ions.　The　impressive　FO　performance　arises　from　the　fact　that　the　betaine　metallic　draw　solutes　contain　abundant　-COO-,　-NMe3+　ionic　moieties　and　have　a　special　polymeric　configuration.　Remarkably,　all　betaine　metallic　complexes　are　readily　regenerated　by　solvent　extraction　with　minimal　energy　input.　The　novel　betaine　metallic　draw　solutes　not　only　tackle　the　low　water　recovery　and　solute　loss　problems　confronted　in　FO　processes,　but　also　can　be　recycled　by　a　more　economic　and　eco-friendly　approach　than　the　current　draw　solutes,　demonstrating　the　suitability　of　the　multi-charged　metallic　complexes　presented　here　for　FO　water　treatment.