According to the technology of situ electrical heating on oil shale, a physical model was established by FLUENT. Numerical analysis of temperature field distribution of oil shale was carried out. In this model, the healing efficiency was increased by time, which was obviously increased when the heating well and oil well exchange heating. When the heating time was less than 3 a, the temperature of oil shale layer was increased steadily. But it did not reach the temperature that oil shale pyrolysis required. When the heating time was greater than 3 a, the temperature of oil shale layer was reached to 350～500 ℃. And it reached the temperature that oil shale pyrolysis required. After pyrolysis, the thermal conductivity, porosity and permeability of oil shale were increased while the temperature was elevated. Therefore, the analysis and control of temperature field of oil shale was helpful to improve the heating efficiency and production of oil shale.