In　this　work,　silicon-carbon　hybrid　materials　were　adopted　as　an　example　to　illustrate　the　novel　strategy　to　in　situ　construct　heterostructure　with　adjustable　microstructure.　Based　on　the　temperature-dependent　thermodynamics　and　kinetics　of　reaction　between　Si　and　C,　the　processes　for　Si　nanocrystals　growth　and　C　decoration　were　coupled　at　different　zones　of　plasma　flame　according　to　its　temperature　and　velocity　fields　by　theoretical　modeling,　aiming　to　intentionally　suppress　the　formation　of　undesirable　carbide,　and　enable　adjusting　the　microstructure　of　each　counterpart　separately　in　transient　process.　As　a　result,　well-controlled　Si/C　nanocomposites,　including　nanospheres　and　nanowires　with　core-shell　structures,　were　achieved,　and　this　continuous　and　in-flight　route　is　also　potential　for　large-scale　production.　Further　investigation　on　the　electrochemical　properties　highlights　the　advantage　of　as　proposed　strategy　to　efficiently　construct　heterostructures　with　superior　performance　for　various　applications.　(c)　2025　Published　by　Elsevier　Ltd　on　behalf　of　The　editorial　office　of　Journal　of　Materials　Science　&　Technology.