The three-dimensional temperature field and formation deformation analysis of oil shale in-situ pyrolysis by horizontal well pattern was carried out by using fluid-thermal-solid coupling simulation. The evolution of temperature field and oil and gas products with increasing the production time under different combustion temperatures and gas injection flow rates were discussed. The deformation characteristics of oil shale formations were also analyzed. The results show that increasing the combustion temperature of the burner can significantly accelerate the in-situ conversion rate of oil shale. However, simply increasing the gas injection flow rate has little effect on the pyrolysis reaction progress. In addition, the formation deformation needs to be considered, especially the influence of the deformation of the bottom of the gas injection and production wells on the operation of the equipment at the bottom. The results provide data support for the oil shale in situ conversion development in China．