The research engine adopted the advanced electric thermal management technologies such as electronic water pump and thermal management module. A matching experiment was carried out on the bench after finishing the electronic water pump selection and the control logic design of thermal management module. The results show that the outlet of electronic water pump should be upward and the filling outlet should be lowered to the level of pump inlet to facilitate the gas exhaust in the water chamber and ensure the normal operation of pump. The performance of electronic water pump meets the cooling requirements of engine, but the leakage of water jacket separator causes the flow distribution of cylinder block and head deviating from the design value, and the water temperature at the exhaust side of cylinder is unusually high, so the strength of water jacket separator needs to be optimized. Reducing the flow of electronic water pump can reduce the heat taken away by the coolant and hence change the heat transfer near the combustion chamber so as to improve the thermal efficiency. In addition, the opening design of arc-shaped ball valve for thermal management module leads to abrupt flow change of each branch at opening or closing, while the opening design of the water-drop shape realizes the slow increase of flow area and the smooth transition of flow.