The bolt connection is one of the most common connection methods applied in a diesel engine. It will affect the dynamic characteristics of the diesel engine's structure．A test model of the machine foot bolt connection is prepared to study the shock resistant characteristics of the bolt connection in the diesel engine. The screw-thread connection model of the beam - spring unit is introduced into the experiment to build the finite element model. A difference less than 5.4% is shown by comparing the results of the test model and the finite element analysis, which has verified the feasibility of the modeling method. With the DDAM (Dynamic Design Analysis Method), the impact safety of all components is verified by analyzing the shock response of the diesel engine's fastened components and phase-coupling the shock stress' response results in three directions. The experiments show that the material of the diesel engine feet should be replaced by one with a higher yield limit, while the machine foot bolts satisfy the national military standard requirements. The bolt connection model is shown to provide realistic results in the diesel engine shock resistance study.