In　this　work,　we　will　propose　some　improvements　and　innovations　for　Submerged　Combustion,　namely　a　Pressurized　Submerged　Combustion　Technology.　This　paper　introduces　the　Pressurized　Submerged　Combustion　and　some　basic　theoretical　research.　To　understand　better　gas　pressure　fluctuations　and　their　influence　in　flame　stability,　a　mathematical　model　is　developed　in　this　paper,　and　its　particular　solution　is　elucidated.　The　results　show　that,　the　variations　of　pressure　are　influenced　by　bubbling　which　is　a　self-excited　oscillation　phenomenon.　Increasing　the　damping　of　liquid　motion　is　very　helpful　for　stabilizing　pressure　fluctuations.　The　model　can　be　used　for　guidance　and　optimization　design　of　Pressurized　Submerged　Combustion　equipments.