Abstract: A diesel model based on speed control was established to simulate the dynamic characteristics of engine. The diesel engine dynamic torque was obtained through dynamic modifying the diesel engine torque MAP, which was calculated based on the data get from steady-state bench test. According to the diesel operating state, the control strategies of full-load, partial-load and speed-limit conditions were designed based on the fuel consumption control. A diesel engine simulation model established in Matlab/Simulink environment was integrated with correlative transmission assemblies to constitute a vehicle dynamic model. And then, diesel engine simulations were carried out in two working conditions. The simulation and experiment results show that, the established model is accurate and effective for the simulation of engine in steady state and transient conditions, and the modeling approach proposed can solve the problem of high-precision modeling in limited test data. This research can provide a reference for quickly predicting the dynamic performance of the diesel engine.