The condensates undergo intricate phase evolution as the operating conditions vary throughout the production and transportation process. Clarifying the wax molecular dynamics behavior of waxy condensates under phase change conditions is of great significance for revealing the wax deposition mechanism and effectively implementing prevention and treatment strategies for wax deposition in condensates extraction. In this paper, various molecular dynamics simulation systems for waxy condensates covering different condensate gas fluid environments of methane, methane-ethane and methane-ethane-propane were constructed based on the analysis result of the physical properties of condensates. The dynamic behavior of wax molecules in the presence of condensate gas was studied considering the phase transition conditions. The results indicate that the solubility of