In order to explore the effects of salinity pulses, tidal fluctuations and their coupling effects on estuarine wetland soil carbon dioxide (CO₂) and methane (CH₄) emissions caused by typhoon storm surge, the soils of the Cyperus malaccensis wetland at Daoqingzhou in the estuary of the Min River were selected as the research object, and an indoor tidal simulation device was used to study the characteristics of CO₂ and CH₄ emissions from estuarine wetlands due to changes in salinity and different tidal processes, as well as the main influencing factors. The results showed that:(1) tidal flooding significantly inhibited CO₂ emissions but promoted CH₄ emissions (P<0.05); the increased salinity (0-8‰) promoted CO₂ emissions (P>0.05); 0-2‰ salinity promoted soil CH₄ emissions (P>0.05), while 2‰-8‰ salinity inhibited soil CH₄ emissions (P<0.05). (2) Salinity pulses coupled with tidal processes significantly suppressed the emissions of CH₄ (P<0.05), and suppressed the emissions of CO₂ to some extent (P>0.05). (3) CO₂ emissions were highly significantly positively correlated with ammoniacal nitrogen (NH₄⁺-N) in pore water (P<0.01), significantly negatively correlated with nitrate nitrogen (NO₃^--N),dissolved organic carbon (DOC) and soil pH (P<0.05).The effect of salinity pulses coupled tidal processes on CO₂ and CH₄ emissions was a positive and negative game process. Under the salinity range of 0 to 8‰, tidal flooding had a greater effect on CO₂ emissions, while salinity played a dominant role in CH₄ emissions. Compared to salinity, tidal flooding was the dominant factor affecting the integrated warming potential of carbon-based greenhouse gases in Min River estuarine wetlands.