For　aiming　at　the　safety　protection　of　personnel　in　the　power　grid　construction　process,　an　integrated　construction　site　monitoring　system　based　on　the　fusion　of　visual　localization　and　ultra　wideband　(UWB)　is　proposed　to　realize　real-time　monitoring　of　the　construction　site　environment　and　real-time　and　accurate　three-dimensional　positioning　of　personnel　and　equipment　terminals.　Aiming　at　the　problems　that　UWB　signal　is　easy　to　be　interfered　and　the　construction　site　vision　is　easy　to　be　blocked,　the　fusion　algorithm　of　visual　localization　and　UWB　positioning　is　proposed　to　make　up　for　the　shortcomings　of　both　and　achieve　more　accurate　positioning.　The　integrated　monitoring　system　proposed　has　been　fully　verified　in　the　experiment,　realizing　the　accurate　three-dimensional　positioning　of　construction　site　personnel.　©　2023　SPIE.