Abstract: The common pressure of the clutch oil pump is 0.2 MPa, and the oil pressure pushes the piston to open the intake valve and separate the clutch. For the lubricating oil pump, it is mostly used in the lubrication and cooling system on the tram, and the noise performance of the oil pump will seriously affect the quality of the whole vehicle. Based on the PUMPLINX platform and LMS SCADAS XS, without changing the number of teeth and the number of motor slots, the conclusion is that the impact vibration of the oil pump is weakened by removing the unloading groove and changing the filling groove of the low-pressure oil pump without changing the number of teeth and the number of motor slots, and the influence of the unloading groove and the oil-filling tank on the NVH of the low-pressure oil pump is verified by about 50%.