The front support of a certain heavy duty diesel engine is taken as an example to introduce the modeling of engine front support. Software ANSYS was applied to carry out FEA analysis on stress distribution and fatigue life of engine front support. The analysis results show that the stress on the connecting position of engine front support with engine and with the vehicle is large, and the stress become smaller as it get further away from the connecting position. As the engine's acceleration reach 6g when it bumps down, the stress distribution in the connecting bolt hole turns to be the worst. The conclusion provides a theoretical basis and a reference for the improvement of engine front support design and its optimization.