Abstract：The thermal management integration module is a multifunctional integrated component. The thermal management integration module includes water pumps, flow channel plates, brackets, sensors, etc. However, due to the large range of speed changes, the water pump will generate a wide range of frequency excitation. This excitation will cause the integrated module to vibrate and generate noise. This article studies and analyzes an integrated module that generates noise. An integrated module of a certain new energy vehicle is used as an example. Firstly, a vehicle experiment was conducted. It was found that the noise came from the integrated module. And then use finite element method to analyze the causes of noise generation. Based on the characteristics of multiple integrated module components, high integration degree, and complex structure. This article simplifies components such as brackets, heat exchangers, sensors, etc. And they are replaced by centralized quality points. Striking the integrated module by using a force hammer can obtain its modals. And compare the test modals with the modals calculated by the finite element method to verify the feasibility of the finite element method. Based on the analysis results, an optimization plan was formulated. Finally, the optimized integrated module was tested. The results showed that the proposed method is beneficial for predicting noise sources, solving noise problems, shortening design cycles, and reducing actual vehicle testing costs.