Image　processing　method　of　the　non-contact　measurement　of　the　dynamic　characteristics　of　relay　has　large　amount　of　data　processing,　algorithm　complexity　and　hardware　cost　is　high.　A　method　that　measured　the　angle　of　relay　armature　in　non-contact　and　real-time　using　the　optical　triangulation　was　proposed.　This　method　is　to　obtain　Angle　data　of　armature　by　using　the　position　sensitive　detectors　and　the　data　acquisition　module.　Using　the　measured　data　was　calculated　in　order　to　get　the　dynamic　characteristic　of　suction　and　release　process　of　relay.　The　armature　and　absorption　process　of　relay　movement　rules　were　analyzed.　With　G2R-1　small　relay　as　the　experimental　object,　the　relay　armature　motor　magnetic　circuit　model　was　established,　the　angle　displacement　of　the　theoretical　value　was　obtained.　By　comparing　the　theoretical　calculation　and　experimental　measurement　of　the　relay　armature　angle　displacement　data,　analysis　of　the　movement　rule　of　relay　armature　attracted　process,　shows　that　this　measurement　method　is　correct　and　feasible.　The　impact　of　the　relay　armature　movement　was　avoided　by　using　Contact　test　method.　Experiments　show　that　the　measurement　real-time　data　of　the　angle　of　the　armature　movement　have　a　good　agreement　with　the　theoretical　value.　The　measuring　device　has　a　simple　structure,　low　cost,　accurate　measurement,　data　processing　a　small　amount,　for　a　wide　range　advantages.