Based　on　the　in　situ　observation　of　methane　hydrate　formation　in　restricted　spaces　by　confocal　Raman　imaging　microscopy,　a　bubble　intrusion　mechanism　is　proposed.　Hydrates　are　found　to　form　both　at　the　gas-water-solid　triple-phase　contact　line　and　at　the　gas-water　interface.　Hydrates　at　the　triple-phase　contact　line　can　form　capillary　channels　with　solid　surfaces.　The　formed　capillary　channels　can　force　the　water　inside　the　droplet　to　diffuse　outward,　leading　to　shrinkage　of　the　droplet　edge　and　generation　of　gas　bubbles　inside　the　droplet.　Hydrates　can　then　rapidly　form　at　the　bubble-solution　interface.　With　the　method　of　Raman　imaging,　gas　channels　are　found　in　the　interfacial　hydrates,　acting　as　bridges　connecting　bubbles　and　the　surrounding　solution.　Through　these　gas　channels,　methane　gas　can　dissolve　rapidly　into　the　solution　in　the　droplets,　thereby　promoting　the　formation　of　hydrates　in　the　droplets.