The　effective　non-precious　metal　catalysts　toward　the　oxygen　evolution　reaction　(OER)　are　highly　desirable　for　electrochemical　water　splitting.　Herein,　we　prepare　a　novel　glass-ceramic　(Ni1.5Sn@triMPO(4))　by　embedding　crystalline　Ni1.5Sn　nanoparticles　into　amorphous　trimetallic　phosphate　(triMPO(4))　matrix.　This　unique　crystalline-amorphous　nanostructure　synergistically　accelerates　the　surface　reconstruction　to　active　Ni(Fe)OOH,　due　to　the　low　vacancy　formation　energy　of　Sn　in　glass-ceramic　and　high　adsorption　energy　of　PO43-　at　the　V-O　sites.　Compared　to　the　control　samples,　this　dual-phase　glass-ceramic　exhibits　a　remarkably　lowered　overpotential　and　boosted　OER　kinetics　after　surface　reconstruction,　rivaling　most　of　state-of-the-art　electrocatalysts.　The　residual　PO43-　and　intrinsic　V-O　sites　induce　redistribution　of　electron　states,　thus　optimizing　the　adsorption　of　OH*　and　OOH*　intermediates　on　metal　oxyhydroxides　and　promoting　the　OER　activity.