To　investigate　the　rule　and　mechanism　of　the　rate　and　extent　of　rebar　corrision　in　high　performance　concrete(HPC),　12　HPC　mix　proportions(considered　fly　ash,　slag　and　anti-corrosion　admixtures)　were　designed　and　each　concrete　specimen　prism　was　inserted　with　two　embedded　rebar　and　the　rebar　were　connected　to　external　direct　current　techniques　to　accelerate　the　corosion.　To　measure　the　rate　of　corosion,　electrochemical　methods　were　used.　For　intuitive　center　dot　perception,　observations　of　the　corrosion　products　were　conducted.　The　results　show　that　load　increased　the　corrosion　rate　of　rebar　in　concrete　apparently.　The　extent　and　rate　of　corosion　as　well　as　the　maximum　width　of　crack　of　the　protective　layer　change　with　different　mineral　admixtures　and　anti-corrosion　admixtures.　The　result　of　this　paper　provided　technical　supports　for　engineering　applications.