Mint　oil　is　a　complex　mixture　of　comparatively　volatile　and　labile　components,　making　it　challenging　to　be　efficiently　encapsulated　and　retained　in　microcapsules　using　traditional　approaches.　Microencapsulation,　by　encapsulating　the　substance　with　certain　shells,　can　effectively　reduce　the　diffusion,　evaporation　and　the　reactions　of　the　inside　actives　with　the　external　environment.　The　microencapsulation　of　mint　oil　and　other　aromatic　actives　have　been　a　prevailing　method　to　improve　the　stability,　prolong　the　storage　time,　and　enhance　the　controllability　of　the　actives.　Monodisperse　core–shell　microcapsules　based　on　double　emulsions　prepared　by　microfluidic　technology　with　controllable　structure,　pH-responsive　ability,　and　adjustable　release　properties　are　successfully　developed.　Different　flow　rates,　glutaraldehyde　concentration,　solidification　time　and　pH　have　been　used　to　adjust　the　core　sizes,　the　shell　thickness,　the　crosslinking　density　and　the　shrinkage　degree　of　the　shell.　By　monitoring　their　mint　oil　sustained　release　ability　through　an　ultraviolet　spectrophotometer,　appropriate　conditions　to　form　the　mint　oil　microcapsules　with　high　encapsulation　efficiency　and　controllability　in　release　properties　are　achieved,　building　the　foundation　for　better　mint　oil　storage,　transportation,　and　their　applications.　©　2020,　Springer-Verlag　GmbH　Germany,　part　of　Springer　Nature.