The source gas wells for the west to east gas pipeline are mainly high temperature and high pressure gas wells. The production capacity of these gas wells highly depends on the pressure and temperature of well bottom. Temperature in the production process plays an important role. In order to ensure normal production of high-temperature and high-pressure gas wells, in depth study of wellbore temperature and pressure must be carried out. There are many mature research results involving wellbore pressure, however, the study on well bottom temperature is still immature, and especially the impact of complex wellbore on the wellbore temperature has not been reported at home and abroad. Based on the classic Ramey wellbore temperature model, two kinds of mathematical models for calculating the well wellbore temperature distribution in the well with complex structure wellbore are built. The models include the one calculating temperature from well bottom to wellhead and the other calculating temperature from wellhead to well bottom. By comprising with the data of field test, the calculation errors are given, and the impact of the wellbore structure on wellbore temperature distribution is analyzed. The results indicate that the calculating result by using the model from the well bottom to the wellhead is better than that by using the model from the wellhead to the well bottom in the temperature distribution calculation.