Human　life,　health　and　social　stability　have　been　under　the　threat　of　infectious　diseases,　and　its　prevention　and　control　work　is　of　great　significance.　In　the　work　of　infectious　disease　prevention　and　control,　rapid　confirmation　of　patients＇　true　track　information　is　the　most　important　part,　and　it　is　also　the　starting　point　and　source　of　information　generation　for　the　whole　work　of　infectious　disease　prevention　and　control.　In　order　to　discover　the　spread　of　specific　diseases　in　time　and　space,　and　improve　the　efficiency　and　quality　of　prevention　and　control　work,　this　paper　designs　a　travel　trajectory　processing　and　visual　analysis　system　for　key　personnel　based　on　the　public　pedestrian　trajectory　data　set.　Its　data　processing　uses　the　dwell　point　trajectory　analysis　algorithm　to　obtain　the　risk　journey　trajectory,　uses　mapbox　to　visualize　the　geospatial　data　of　the　risk　journey　trajectory,　assists　the　prevention　and　control　staff　to　confirm　and　report　the　trajectory,　and　optimizes　the　overall　response　process　through　the　information　module,　so　as　to　further　strengthen　the　ability　to　prevent　and　control　infectious　diseases,　shorten　the　response　time　of　infectious　disease　reports,　and　improve　the　accuracy　of　prevention　and　control　decisions.　©　2023　IEEE.