Wax deposition in gas wells of condensate reservoir is the main factor affecting the development of condensate reservoir.This paper takes Bozi high wax condensate gas well in Tarim Basin as the research object,uses high temperature and high pressure equipment and laser test to carry out wax deposition test in condensate gas reservoir under high temperature and high pressure,uses Differential Scanning Calorimeter test, chromatographic analysis to separate the characteristics of wax deposition,and uses self-developed thin tube dynamic wax deposition equipment to analyze the effects of different flow rates,gas-oil ratio and particles on wax deposition in high temperature and high pressure condensate gas well,and uses multiphase flow wellbore deposition dynamic model to predict the wax deposition law under different daily output.The results show that the highest wax deposition point of Bozi condensate gas is 33.71℃, and its wax content is also the highest.At -20℃,the wax accumulation of condensate oil is lower than that of condensate oil, and the wax content and density of well 102-2 are the highest. With the increase of flow rate, the wax deposition rate decreases.With the increase of gas-oil ratio,the wax formation rate of condensate gas decreases.The dynamic prediction model of multiphase flow wellbore deposition is used to analyze the wax deposition in the wellbore, and it is concluded that there is no wax deposition in the wellbore when the daily output exceeds 3.4×105m3.The research results provide theoretical data support for wax deposition law in ultra-deep condensate gas reservoirs.