This　paper　proposes　an　energy　analysis　method　of　the　laser　tracing　measurement　optical　system.　Based　on　the　principle　of　the　laser　tracing　measurement　optical　system,　an　energy　model　is　established　to　analyze　the　effects　of　non-ideal　optical　elements　on　the　energy　of　the　optical　system.　The　simulation　results　show　that　the　interference　pattern　is　the　most　obvious　when　the　split　ratios　of　the　beam　splitters　in　the　interference　part　and　the　tracing　part　are　respectively　6:　4　and　7:　3.　Under　the　above　split　ratios,　the　interference　signal　energy　values　of　four　receivers　are　close　to　each　other　and　the　visibility　of　fringe　pattern　reaches　0.99.　The　visibility　of　fringe　patterns　of　four　interference　signals　is　reduced　when　the　reflectivity　of　all　polarization　beam　splitters　is　under　non-ideal　conditions　in　an　entire　optical　system.　The　non-ideality　of　the　transmittance　of　the　polarization　beam　splitters　does　not　affect　the　visibility　of　fringe　patterns.　The　paper　provides　the　theoretical　basis　for　the　accuracy　improvement,　reliability　evaluation,　optical　system　design　and　the　selection　of　optical　elements　of　laser　tracing　measurement　systems.