The interaction between atmospheric pressure low-temperature plasma and liquids is prevalent across various fields, including biomedicine, environmental protection and analytical chemistry. In practical applications, liquid deformation inevitably occurs. But the impact of liquid surface deformation on plasma remains poorly understood. Liquid surface deformation represents one of the most significant phenomena occurring at the gas-liquid interface. It not only alters the interface morphology but also influences momentum and mass transfer between gas and liquid phases, generating convection that affects system stability. Nevertheless, existing experimental and simulation studies have primarily focused on deformation at the plasma-liquid interface, with insufficient investigation into the specific mechanisms by which liquid surface deformation influences discharge characteristics and chemical distribution within plasma-liquid systems. This paper explores the phenomenon of liquid deformation by simulation analysis, which has been neglected in previous related work. It investigates the mechanism by which liquid surface deformation affects plasma-liquid systems, contributing to a deeper understanding of plasma-liquid interactions and providing better theoretical guidance for related applications and technologies.