The　SEM　technique　is　used　to　observe　and　study　the　microstructure　of　cement-sodium　silicate-stabilized　soft　soils　with　different　curing　time.　The　GIS　technique　is　employed　to　realize　3D　visualization　of　the　image　of　SEM　and　to　calculate　the　porosity　of　the　soils　before　and　after　stabilization.　The　results　show　that　the　principal　components　of　cement-sodium　silicate　hydration　products　are　respectively　ettringite　in　early　days　and　hydrated　calcium　silicate　in　later　days.　The　shapes　of　the　hydrated　products　are　mainly　fibrous　and　prismatical.　They　play　a　role　of　reinforcement　by　attaching　each　other　to　form　network　and　enwrapping　the　soil　particles　to　form　greater　particles.　The　micromechanism　of　cement-sodium　silicate-stabilized　soft　soils　is　analyzed　from　both　chemical　and　physical　points　of　view.　From　the　chemical　point　of　view　it　mainly　includes　hydrolysis　and　hydration　reaction　of　cement,　rapid　hardening　and　reinforcement　of　sodium　silicate　and　the　effect　between　clay　particles　and　cement,　while　from　the　physical　point　of　view,　it　includes　filling　effect,　cementation　effect,　reinforcement　effect　and　skeleton　effect.　It　is　of　important　significance　for　the　design　and　construction　of　foundation　treatment　in　soft　soil　areas.