In　view　of　the　current　TCP　congestion　control　slow-start　algorithm　and　its　waste　of　bandwidth　due　to　short　connections,　network　congestion　and　packet　loss　caused　by　the　rapid　growth　of　the　congestion　window　in　the　later　period,　this　paper　studies　the　slow-start　algorithm　part　of　the　TCP　transmission　protocol.　Considering　the　characteristics　of　the　current　relatively　high　speed　network,　this　paper　proposes　an　improved　slow　start　algorithm　with　traffic　awareness.　By　statistical　analysis　of　data　transmission　in　the　network,　the　algorithm　dynamically　determines　the　initial　congestion　window　size　of　slow　start,　and　dynamically　adjusts　the　congestion　window　by　tracking　the　changes　of　real-time　network　traffic.　In　the　slow　start　stage,　the　smoothness　of　the　congestion　window　is　further　analyzed　and　the　smoothness　of　the　window　growth　is　corrected　in　real　time,　so　that　the　congestion　window　does　not　increase　exponentially,　but　increases　by　a　more　efficient　power　function.　The　results　of　this　experiment　show　that　the　improved　algorithm　slows　down　the　growth　rate　of　the　congestion　window　and　improves　the　smoothness　of　the　window　growth.　It　also　significantly　improved　the　data　transmission　rate　and　throughput.　©　2023　SPIE.